English: VANDENBERG AIR FORCE BASE, Calif. -- Using a celestial sphere, Staff Sgt. Dallin Skelton, left, a 533rd Training Squadron student, shows Tech. Sgt. Cory Beebe, a 533rd TRS enlisted Space 100 instructor, a point used to see the apparent path the sun takes through the stars. The 533rd TRS, an original missile squadron and a training detachment at Schriever AFB, Colo., provides initial qualification training for attack warning, space surveillance and counter-drug missions. (U.S. Air Force photo/Senior Airman Christian Thomas)