U.S. President Barack Obama (R) shakes hands with U.S. Chamber of Commerce COO David Chavern (C) as U.S. Secretary of Transportation Ray LaHood (L) looks on after Obama speaks about a clean extension of the Federal Aviation Administration Reauthorization which expires in mid-September in the Rose Garden of the White House in Washington, August 31, 2011. REUTERS/Larry Downing (UNITED STATES - Tags: POLITICS)