A timed exposure shows Vietnamese Prime Minister Nguyen Tan Dung's motorcade departing the flight line at Joint Base Andrews, Md., April 11, 2010, The delegate landed at Andrews on his way to the Nuclear Security Summit hosted by President Barack Obama in Washington, D.C., slated for Monday and Tuesday. The 316th Wing is leading operations to provide safe, effective, and efficient arrival and departure services for the invited guests transiting Andrews. (U.S. Air Force photo by Airman 1st Class Perry Aston) (Released)