Article Photos: Obama nominates Wal-Mart's Burwell as budget chief 1/1

President Barack Obama announces in the East Room of the White House in Washington, Monday, March 4, 2013, he will nominate, from left:  MIT physics professor Ernest Moniz for Energy Secretary; Gina McCarthy to head the EPA;  and Walmart Foundation President Sylvia Mathews Burwell to head the Budget Office. (AP Photo/Pablo Martinez Monsivais)