President Obama announces his choices (from left) of MIT physics professor Ernest Moniz for energy secretary, Gina McCarthy to head the Environmental Protection Agency, and Wal-Mart Foundation President Sylvia Mathews Burwell to head the Office of Management and Budget during a ceremony Monday in the East Room of the White House. (Associated Press)

President Obama announces his choices (from left) of MIT physics professor Ernest Moniz for energy secretary, Gina McCarthy to head the Environmental Protection Agency, and Wal-Mart Foundation President Sylvia Mathews Burwell to head the Office of Management and Budget during a ceremony Monday in the East Room of the White House. (Associated Press)