Supporters of gun control legislation hold candles and placards during a rally to pay respect for the shooting victims in front of the White House in Washington, capital of the United States, Dec. 14, 2012, following a deadly shooting spree in an elementary school in Newtown, Connecticut, which took place earlier in the day. (Xinhua/Zhang Jun)

Supporters of gun control legislation hold candles and placards during a rally to pay respect for the shooting victims in front of the White House in Washington, capital of the United States, Dec. 14, 2012, following a deadly shooting spree in an elementary school in Newtown, Connecticut, which took place earlier in the day. (Xinhua/Zhang Jun)

Supporters of gun control legislation hold candles and placards during a rally to pay respect for the shooting victims in front of the White House in Washington, capital of the United States, Dec. 14, 2012, following a deadly shooting spree in an elementary school in Newtown, Connecticut, which took place earlier in the day. (Xinhua/Zhang Jun)

A supporter of gun control legislation holds a candle and a placard during a rally to pay respect for the shooting victims in front of the White House in Washington, capital of the United States, Dec. 14, 2012, following a deadly shooting spree in an elementary school in Newtown, Connecticut, which took place earlier in the day. (Xinhua/Zhang Jun)

Supporters of gun control legislation hold candles during a rally to pay respect for the shooting victims in front of the White House in Washington, capital of the United States, Dec. 14, 2012, following a deadly shooting spree in an elementary school in Newtown, Connecticut, which took place earlier in the day. (Xinhua/Zhang Jun)

Supporters of gun control legislation hold candles during a rally to pay respect for the shooting victims in front of the White House in Washington, capital of the United States, Dec. 14, 2012, following a deadly shooting spree in an elementary school in Newtown, Connecticut, which took place earlier in the day. (Xinhua/Zhang Jun)

Supporters of gun control legislation hold candles and placards during a rally to pay respect for the shooting victims in front of the White House in Washington, capital of the United States, Dec. 14, 2012, following a deadly shooting spree in an elementary school in Newtown, Connecticut, which took place earlier in the day. (Xinhua/Zhang Jun)