US President Barack Obama wipes a tear from his eye as he speaks during a previously unannounced appearance in the Brady Briefing Room of the White House on December 14, 2012 in Washington, DC. Obama spoke following the shooting in a Connecticut Elementary School which left at least 27 people dead. President Obama on Friday ordered US flags on the White House, official buildings and at military facilities to half staff to honor the victims of the school shooting rampage in Connecticut. The order remains in effect until sunset on December 18, the president said in a proclamation, decrying the attack as a "senseless acts of violence" moments before giving his first on camera reaction to the tragedy.   AFP PHOTO/Mandel NGAN        (Photo credit should read MANDEL NGAN/AFP/Getty Images)