President Barack Obama shakes hands with an unidentified man in a wheelchair after signing an Executive Order on stem cells and a Presidential Memorandum on scientific integrity, Monday, March 9, 2009, in the East Room of the White House in Washington. AP Photo logo AP Photo 35 months ago

President Barack Obama shakes hands with an unidentified man in a wheelchair after signing an Executive Order on stem cells and a Presidential Memorandum on scientific integrity, Monday, March 9, 2009, in the East Room of the White House in Washington.