PETERSON AIR FORCE BASE, Colo., May 14 (UPI) -- A new command center opened Tuesday that fully integrates the North American Aerospace Defense Command and the U.S. Northern Command.

COLORADO SPRINGS, April 14 (UPI) -- Canada's top defense official said his country's relationship with the North American Aerospace Defense Command is vital for continued security.

COLORADO SPRINGS, March 11 (UPI) -- U.S. Air Force officials would like Russia to be more open about its increased schedule of strategic bomber flights, the Denver Post reported Tuesday.

ORLANDO, Fla., Feb. 25 (UPI) -- A top U.S. Air Force commander says he expects the terrorist threat facing the United States to continue for many years to come.

WASHINGTON, May 31 (UPI) --

WASHINGTON, April 28 (UPI) --