SCOTT AIR FORCE BASE, Ill. -- An Airman from the 932nd Maintenance Squadron stands by with wheel chalks as Air Force One, carrying President Barack Obama, taxis into position March 10, 2010, at St. Louis - Lambert International Airport. Airmen from the 375th Logistics Readiness Squadron and the 932nd Maintenance Squadron provided refueling and vehicle maintenance support to Air Force One for the president’s visit to St. Louis. (U.S. Air Force photo by Senior Airman Ryan Crane)