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.

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.

Twenty-seven wooden angel figures are seen placed in a wooded area beside a road near the Sandy Hook Elementary School for the victims of a school shooting in Newtown, Connecticut, December 16, 2012.

Ava Staiti, 7, of New Milford, Conn., looks up at her mother Emily Staiti, not pictured, while visiting a sidewalk memorial with 26 teddy bears, each representing a victim of the Sandy Hook Elementary School shooting, December 16, 2012, in Newtown, Connecticut.

Mourners gather for a candlelight vigil at Ram's Pasture to remember shooting victims, December 15, 2012 in Newtown, Connecticut.

A woman reacts while paying respects for shooting victims at a makeshift memorial at St. Rose of Lima Roman Catholic Church, December 16, 2012, in Newtown, Connecticut.

A young child points at candles as people pay their respects at a makeshift shrine to the victims of a elementary school shooting in Newtown, Connecticut, December 16, 2012.

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.

Residents hold a candlelight vigil outside Newtown High School after President Barack Obama delivered remarks at an interfaith vigil for the victims of the Sandy Hook Elementary School shooting, December 16, 2012.

Varinder Singh, of the Queens borough of New York, joins a group of Sikhs from around the Northeastern U.S., in a moment of prayer as a memorial service is broadcast over a loudspeaker outside Newtown High School, December 16, 2012.

A young child points at candles as people pay their respects at a makeshift shrine to the victims of a elementary school shooting in Newtown, Connecticut, December 16, 2012.

Kate Suba, left, Jaden Albrecht, center, and Simran Chand pay their respects at one of the makeshift memorials in honor of the victims of the Sandy Hook Elementary School shooting, Sunday, December 16, 2012, in Newtown, Connecticut.