U.S. President Barack Obama nominates three new members of his staff in Washington

 
U.S. President Barack Obama nominates three new members of his staff in Washington
U.S. President Barack Obama (2nd R) nominates (from L-R) nuclear physicist Ernest Moniz to lead the Department of Energy, air quality expert Gina McCarthy to lead the Environmental Protection Agency, and Walmart's Sylvia Mathews Burwell to become director of the White House budget office, in the East Room of the White House in Washington, March 4, 2013. REUTERS/Larry Downing