The Obama White House, from the man behind the lens

For the past eight years, Pete Souza has visually chronicled the Obama era. He was in the situation room when U.S. special forces killed Osama Bin Laden in 2011 and at the prayer service for victims of the Newtown, Connecticut, school shooting. John Yang sits down with Souza to discuss the “little unexpected gems” that became iconic moments and the constant character of the president he saw.