U.S.President Obama walks back to the Oval Office after signing a Presidential Memorandum at the White House in Washington

 
U.S.President Obama walks back to the Oval Office after signing a Presidential Memorandum at the White House in Washington
U.S.President Barack Obama walks back to the Oval Office after signing a Presidential Memorandum outlining the next steps in his vision for cleaner, more efficient vehicles in the Rose Garden at the White House in Washington, May 21, 2010. REUTERS/Jim Young (UNITED STATES - Tags: POLITICS ENVIRONMENT TRANSPORT BUSINESS)