President Bill Clinton (center) leads the applause for a fly-by of aircraft from each of the five armed services during the opening ceremonies of the annual joint services open house and air show at Andrews Air Force Base, Md., on May 19, 2000. This year's event commemorates the 50th anniversary of Armed Forces Day. Joining Clinton on the platform are from left to right: Chairman of the Joint Chiefs of Staff Gen. Henry H. Shelton, U.S. Army; Sen. John Glenn (D-Ohio); Secretary of Defense William S. Cohen and Secretary of Transportation Rodney E. Slater.