President Barack Obama pauses in the East Room of the White House in Washington, Monday, March 4, 2013, where he announced will nominate, from left; MIT physics professor Ernest Moniz

 

              President Barack Obama pauses in the East Room of the White House in Washington, Monday, March 4, 2013, where he announced will nominate, from left;  MIT physics professor Ernest Moniz
President Barack Obama pauses in the East Room of the White House in Washington, Monday, March 4, 2013, where he announced 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)