1 of 6 View Caption

Al Hartmann | The Salt Lake Tribune Col. William King, commander of Dugway Proving Ground, speaks to reporters just outside th Jim Urquhart | The Associated Press Vehicles are searched before exiting the main gate at Dugway Proving Ground military base Th Jim Urquhart | The Associated Press Vehicles are stopped at the main gate at Dugway Proving Ground military base Thursday, Jan. Courtesty of U.S. Army Dugway Proving Ground The main gate at Dugway Proving Ground military base, located about 85 miles southwest of Salt Lake City. Base authorities continu