An aide to U.S. President Barack Obama carries a sapling from the Emancipation Oak tree down the steps of Air Force One at Andrews Air Force Base near Washington, May 9, 2010. The small plant was given to Obama as a gift, after he gave the commencement speech to the class of 2010 on Sunday morning, which he said will be planted in the gardens of the White House. REUTERS/Jason Reed (UNITED STATES - Tags: POLITICS)