NEWTOWN, CT - DECEMBER 16: U.S. President Barack Obama speaks at an interfaith vigil for the shooting victims from Sandy Hook Elementary School on December 16, 2012 at Newtown High School in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Olivier Douliery-Pool/Getty Images) Photo: Pool, Getty Images

A woman covers her face as US President Barack Obama reads out the names of children killed during Sandy Hook Elementary School shooting at a interfaith memorial for victims and relatives at the Newtown High School on December 16, 2012 in Newtown, Connecticut. Twenty-six people were killed when a gunman entered Sandy Hook Elementary and began a shooting spree. AFP PHOTO/Mandel NGANMANDEL NGAN/AFP/Getty Images Photo: Mandel Ngan, AFP/Getty Images

NEWTOWN, CT - DECEMBER 16: U.S. President Barack Obama is greeted by R-Fairfield, John McKinney, the Ct. Senate minority leader, before being seated in the audience for the 90 minute service on December 16, 2012 at Newtown High School in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Stephen Dunn-Pool/Getty Images) Photo: Pool, Getty Images

NEWTOWN, CT - DECEMBER 16: U.S. President Barack Obama waits to speak at an interfaith vigil for the shooting victims from Sandy Hook Elementary School on December 16, 2012 at Newtown High School in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Olivier Douliery-Pool/Getty Images) Photo: Pool, Getty Images

A U.S. flag flies at half staff outside the Newtown High School before President Barack Obama is scheduled to attend a memorial for the victims of the Sandy Hook Elementary School shooting, Sunday, Dec. 16, 2012, in Newtown, Conn. A gunman walked into Sandy Hook Elementary School in Newtown Friday and opened fire, killing 26 people, including 20 children. (AP Photo/David Goldman) Photo: Contributed Photo, AP

NEWTOWN, CT - DECEMBER 16: Isabel Lebron holds son Izaiah Taylor at a memorial with donated Christmas trees honoring victims near the school on the first Sunday following the mass shooting at Sandy Hook Elementary School on December 16, 2012 in Newtown, Connecticut. U.S. President Barack Obama visited the grief stricken town today. (Photo by Mario Tama/Getty Images) Photo: Mario Tama, Getty Images

NEWTOWN, CT - DECEMBER 16: U.S. President Barack Obama waves after speaking at an interfaith vigil for the shooting victims from Sandy Hook Elementary School on December 16, 2012 at Newtown High School in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Olivier Douliery-Pool/Getty Images) Photo: Pool, Getty Images

US President Barack Obama speaks at a memorial service for the victims of the Sandy Hook Elementary School shooting on December 16, 2012 in Newtown, Connecticut. Obama will address the memorial for the twenty-six people, 20 of them children, who were killed when a gunman entered Sandy Hook Elementary and began a shooting spree. AFP PHOTO/Mandel NGANMANDEL NGAN/AFP/Getty Images Photo: Mandel Ngan, AFP/Getty Images

NEWTOWN, CT - DECEMBER 16: Mourners comfort one another before U.S. President Barack Obama speaks at an interfaith vigil for the shooting victims from Sandy Hook Elementary School on December 16, 2012 at Newtown High School in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Olivier Douliery-Pool/Getty Images) Photo: Pool, Getty Images

NEWTOWN, CT - DECEMBER 16: A woman holds a class photo while waiting for U.S. President Barack Obama to speak at an interfaith vigil for the shooting victims from Sandy Hook Elementary School on December 16, 2012 at Newtown High School in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Olivier Douliery-Pool/Getty Images) Photo: Pool, Getty Images

NEWTOWN, CT - DECEMBER 16: A mourner wipes tears from her eyes before U.S. President Barack Obama speaks at an interfaith vigil for the shooting victims from Sandy Hook Elementary School on December 16, 2012 at Newtown High School in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Olivier Douliery-Pool/Getty Images) Photo: Pool, Getty Images

A Sandy Hook firefighter talks to people waiting for President Barack Obama to speak in the Newtown High School auditorium on Sunday, Dec. 16, 2012. Photo: Jason Rearick

People wait in line to enter Newtown High School for a memorial vigil attended by President Barack Obama for the victims of the Sandy Hook Elementary School shooting, Sunday, Dec. 16, 2012, in Newtown, Conn. (AP Photo/David Goldman) Photo: Contributed Photo, AP

President Obama arrives at the Bradley Air National Guard Base in East Granby, Conn., Sunday, Dec. 16, 2012. The President is in Connecticut to attend a vigil for the victims of the Sandy Hook Elementary School shooting where 26 people, including 20 children, were killed Friday. (AP Photo/Jessica Hill) Photo: Contributed Photo, AP

Newtown Police Officer Maryhelen McCarthy carries flowers near a memorial for shooting victims Sunday, Dec. 16, 2012 in Newtown, Conn. A gunman walked into Sandy Hook Elementary School in Newtown, Friday and opened fire, killing 26 people, including 20 children. The flowers and other items were taken to nearby Saint Rose of Lima Roman Catholic Church. (AP Photo/Jason DeCrow) Photo: Jason DeCrow, Associated Press

Kristen Brassard (Left) and Kat Donohue, both of Newtown, hug outside of the Sandy Hook School December 16, 2012 in Newtown, Connecticut.  Photo: Spencer Platt, Getty Images

Twenty seven angel wood cut-outs are set up on hillside in memory to the victims of an elementary school shooting in Newtown, Connecticut, December 16, 2012.  Photo: Emmanuel Dunand, AFP/Getty Images

WASHINGTON, DC - DECEMBER 16: (AFP OUT) U.S. President Barack Obama waves as he departs the White House to travel to Connecticut December 16, 2012 in Washington, DC. President Obama will meet with the families of victims of the shooting at Sandy Hook Elementary School in Newtown. (Photo by Brendan Hoffman-Pool/Getty Images) Photo: Pool, Getty Images

US President Barack Obama steps off Air Force One upon arrival at Bradley Air National Guard Base in East Granby, Connecticut, on December 16, 2012. Obama is heading to Newtown, Connecticut, to attend a memorial service for victims of the Sandy Hook Elementary School shooting. AFP PHOTO/Mandel NGANMANDEL NGAN/AFP/Getty Images Photo: Mandel Ngan, AFP/Getty Images

A black Honda Civic is transported from the Sandy Hook Elementary School crime scene, Sunday Dec. 16, 2012, in Newtown Conn. The car appears to match a description of the vehicle Adam Lanza drove to the school on the day of the tragic shooting on Dec. 14, 2012. Photo: Will Waldron, Hearst Newspapers/Will Waldron

This undated photo shows Adam Lanza posing for a group photo of the technology club which appeared in the Newtown High School yearbook. Authorities have identified Lanza as the gunman who killed his mother at their home and then opened fire Friday, Dec. 14, 2012, inside an elementary school in Newtown, Conn., killing 26 people, including 20 children, before killing himself. Richard Novia, a one-time adviser to the technology club, verified that the photo shows Lanza. (AP Photo) Photo: Associated Press

NEWTOWN, CT - DECEMBER 16: Thousands of people make their way to a memorial in front of the Sandy Hook School December 16, 2012 in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Spencer Platt/Getty Images) Photo: Spencer Platt, Getty Images

A group of nuns leave after paying their respects at a makeshift shrine to the victims of a elementary school shooting in Newtown, Connecticut, December 16, 2012. A young gunman slaughtered 20 small children and six teachers on December 14,2012 after walking into a school in an idyllic Connecticut town wielding at least two sophisticated firearms. AFP PHOTO/Emmanuel DUNANDEMMANUEL DUNAND/AFP/Getty Images Photo: Emmanuel Dunand, AFP/Getty Images

People place holiday wreaths at a makeshift shrine to the victims of a elementary school shooting in Newtown, Connecticut, December 16, 2012. A young gunman slaughtered 20 small children and six teachers on December 14,2012 after walking into a school in an idyllic Connecticut town wielding at least two sophisticated firearms. AFP PHOTO/Emmanuel DUNANDEMMANUEL DUNAND/AFP/Getty Images Photo: Emmanuel Dunand, AFP/Getty Images

NEWTOWN, CT - DECEMBER 16: Ty Diaz holds his mother Yvette and father Eddie at a memorial down the street from the Sandy Hook School December 16, 2012 in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Spencer Platt/Getty Images) Photo: Spencer Platt, Getty Images

NEWTOWN, CT - DECEMBER 16: A woman pauses at a memorial down the street from the Sandy Hook School December 16, 2012 in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Spencer Platt/Getty Images) Photo: Spencer Platt, Getty Images

State police check buildings on the St. Rose of Lima Church campus in the Sandy Hook section of Newtown, Conn. after an unspecified threat on Sunday, Dec. 16, 2012. Parishioners were evacuated during noon mass. Photo: BK Angeletti, B.K. Angeletti

Armed State Police members file past a memorial to the victims of Sandy Hook Elementary School, Sunday Dec. 16, 2012, at Saint Rose of Lima Catholic Church in Newtown, Conn. Police responded to a threat called in at the Church. It was evacuated in the middle of Sunday services. Photo: Will Waldron, Hearst Newspapers/Will Waldron

People bring flowers to a memorial outside of St. Rose of Lima Church in the Sandy Hook section of Newtown, Conn. on Sunday, Dec. 16, 2012. Photo: BK Angeletti, B.K. Angeletti

Teenagers decorate Christmas trees set up at a makeshift shrine to the victims of a elementary school shooting in Newtown, Connecticut, December 16, 2012. A young gunman slaughtered 20 small children and six teachers on December 14,2012 after walking into a school in an idyllic Connecticut town wielding at least two sophisticated firearms. AFP PHOTO/Emmanuel DUNANDEMMANUEL DUNAND/AFP/Getty Images Photo: Emmanuel Dunand, AFP/Getty Images

A star bearing the name of one of an elementary school shooting adorns a christmas tree set up at a makeshift shrine to the victims of a elementary school shooting in Newtown, Connecticut, December 16, 2012. A young gunman slaughtered 20 small children and six teachers on December 14,2012 after walking into a school in an idyllic Connecticut town wielding at least two sophisticated firearms. AFP PHOTO/Emmanuel DUNANDEMMANUEL DUNAND/AFP/Getty Images Photo: Emmanuel Dunand, AFP/Getty Images

A pair of angel wings and balloons stand after being offered at a makeshift shrine to the victims of a elementary school shooting in Newtown, Connecticut, December 16, 2012. A young gunman slaughtered 20 small children and six teachers on December 14,2012 after walking into a school in an idyllic Connecticut town wielding at least two sophisticated firearms. AFP PHOTO/Emmanuel DUNANDEMMANUEL DUNAND/AFP/Getty Images Photo: Emmanuel Dunand, AFP/Getty Images

NEWTOWN, CT - DECEMBER 16: Eric Mueller places twenty seven wooden angles he made in his yard down the street from the Sandy Hook School on December 16, 2012 in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza was found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Spencer Platt/Getty Images) *** BESTPIX *** Photo: Spencer Platt, Getty Images

NEWTOWN, CT - DECEMBER 16: People gather at a memorial for victims near the school on the first Sunday following the mass shooting at Sandy Hook Elementary School on December 16, 2012 in Newtown, Connecticut. U.S. President Barack Obama visited the grief stricken town today. (Photo by Mario Tama/Getty Images) Photo: Mario Tama, Getty Images

A woman pays her respects at a makeshift memorial outside St. Rose of Lima Roman Catholic Church before Mass, Sunday, Dec. 16, 2012, in Newtown, Conn. On Friday, a gunman allegedly killed his mother at their home and then opened fire inside the Sandy Hook Elementary School in Newtown, killing 26 people, including 20 children. (AP Photo/Julio Cortez) Photo: Julio Cortez, Associated Press

Angel cut-outs are displayed outside Newtown High School in Newtown, Conn., Sunday, Dec. 16, 2012. A gunman opened fire at Sandy Hook Elementary School in the town, killing 26 people, including 20 children before killing himself on Friday. (AP Photo/Charles Krupa) Photo: Charles Krupa, Associated Press

A woman lays flowers at the site of a makeshift memorial for school shooting victims at the village of Sandy Hook in Newtown, Conn., Sunday, Dec. 16, 2012. A gunman opened fire at Sandy Hook Elementary School in the town, killing 26 people, including 20 children before killing himself on Friday. (AP Photo/Charles Krupa) Photo: Charles Krupa, Associated Press

A message of thanks and prayer is displayed outside a home in the wake of a deadly school shooting, Sunday, Dec. 16, 2012, in Newtown, Conn. A gunman walked into Sandy Hook Elementary School in Newtown on Friday and opened fire, killing 26 people, including 20 children. (AP Photo/Jason DeCrow) Photo: Jason DeCrow, Associated Press

HOUSTON, TX - DECEMBER 16: J.J. Watt #99 of the Houston Texans displays a glove to remember the victims of the massacre at Sandy Hook Elementary School in Newtown, Connecticut prior to the start of the game against the Indianapolis Colts at at Reliant Stadium on December 16, 2012 in Houston, Texas. (Photo by Scott Halleran/Getty Images) *** BESTPIX *** Photo: Scott Halleran, Getty Images

HOUSTON, TX - DECEMBER 16: Houston Texans fans take a moment to remember the victims of a massacre at Sandy Hook Elementary School in Newtown, Connecticut prior to the start of the game against the Indianapolis Colts at at Reliant Stadium on December 16, 2012 in Houston, Texas. (Photo by Scott Halleran/Getty Images) Photo: Scott Halleran, Getty Images