CAMP DAVID, MD - OCTOBER 21: In this handout image provided by The White House, U.S. President Barack Obama reads briefing material while meeting with advisors inside his cabin October 21, 2012 at Camp David, Maryland. The president also convened a conference call with Homeland Security Advisor John Brennan, FBI Director Robert Mueller and Chief of Staff Jack Lew to discuss the mass shooting in Wisconsin as the news unfolded. (Photo by Pete Souza/The White House via Getty Images)
