A woman waits to hear about her sister, a teacher, following a shooting at the Sandy Hook Elementary School in Newtown, Conn. where authorities say a gunman opened fire, leaving 27 people dead, including 20 children, Friday, Dec. 14, 2012. (AP Photo/Jessica Hill)

In this photo provided by the Newtown Bee, Connecticut State Police lead children from the Sandy Hook Elementary School in Newtown, Conn., following a reported shooting there Friday, Dec. 14, 2012. (AP Photo/Newtown Bee, Shannon Hicks) MANDATORY CREDIT

Parents leave a staging area after being reunited with their children following a shooting at the Sandy Hook Elementary School in Newtown, Conn. where authorities say a gunman opened fire, leaving 27 people dead, including 20 children, Friday, Dec. 14, 2012. (AP Photo/Jessica Hill)

Heavily armed Connecticut State troopers are on the scene at the Sandy Hook School following a shooting at the school, Friday, Dec. 14, 2012 in Newtown, Conn. A man opened fire inside the Connecticut elementary school where his mother worked Friday, killing 26 people, including 18 children, and forcing students to cower in classrooms and then flee with the help of teachers and police. (AP Photo/The Journal News, Frank Becerra Jr.) MANDATORY CREDIT, NYC OUT, NO SALES, TV OUT, NEWSDAY OUT; MAGS OUT

Heavily armed Connecticut State troopers are on the scene at the Sandy Hook School following a shooting at the school, Friday, Dec. 14, 2012 in Newtown, Conn. A man opened fire inside the Connecticut elementary school where his mother worked Friday, killing 26 people, including 18 children, and forcing students to cower in classrooms and then flee with the help of teachers and police. (AP Photo/The Journal News, Frank Becerra Jr.) MANDATORY CREDIT, NYC OUT, NO SALES, TV OUT, NEWSDAY OUT; MAGS OUT

Victims family leave a firehouse staging area following a shooting at the Sandy Hook School in Newtown, Conn. where authorities say a gunman opened fire, leaving 27 people dead, including 20 children, Friday, Dec. 14, 2012. (AP Photo/Jessica Hill)

Parents walk past police and firefighters away from the Sandy Hook Elementary School with their children following a shooting at the school, Friday, Dec. 14, 2012 in Newtown, Conn. A man opened fire inside the Connecticut elementary school where his mother worked Friday, killing 26 people, including 18 children, and forcing students to cower in classrooms and then flee with the help of teachers and police. (AP Photo/The Journal News, Frank Becerra Jr.) MANDATORY CREDIT, NYC OUT, NO SALES, TV OUT, NEWSDAY OUT; MAGS OUT

President Barack Obama wipes his eye as he speaks about the elementary school shooting in Newtown, Conn., Friday, Dec. 14, 2012, in the briefing room of the White House in Washington. (AP Photo/Charles Dharapak)

In this photo provided by the Newtown Bee, a police officer leads two women and a child from Sandy Hook Elementary School in Newtown, Conn., where a gunman opened fire, killing 26 people, including 20 children, Friday, Dec. 14, 2012. (AP Photo/Newtown Bee, Shannon Hicks) MANDATORY CREDIT: NEWTOWN BEE, SHANNON HICKS

A mother hugs her daughter following a shooting at the Sandy Hook Elementary School in Newtown, Conn., about 60 miles (96 kilometers) northeast of New York City, Friday, Dec. 14, 2012. An official with knowledge of Friday's shooting said 27 people were dead, including 18 children. It was the worst school shooting in the country's history. (AP Photo/The New Haven Register, Melanie Stengel)

A woman waits to hear about her sister, a teacher, following a shooting at the Sandy Hook Elementary School in Newtown, Conn., about 60 miles (96 kilometers) northeast of New York City, Friday, Dec. 14, 2012. An official with knowledge of Friday's shooting said 27 people were dead, including 18 children. It was the worst school shooting in the country's history. (AP Photo/The New Haven Register, Melanie Stengel)