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, Seoul: Unusual activities were detected in a rugged area in North Korea on Monday, causing South Korean authorities to...

, LONDON: North Korea's next challenge after testing a nuclear warhead is to make one small enough to fit to...

, China has condemned what it described as North Korea's "brazen" nuclear test, although it urged the international community to...

, WASHINGTON: A US Army missile defense system has proven it can hit enemy ballistic missiles and has been moved...

, ROBINS AIR FORCE BASE: The use of synthetic fuel is vital if the Air Force is to have the...

, Natick MA: Scientists at the U.S. Army Research Institute of Environmental Medicine are investigating ways to help soldiers adjust...

, St. Louis MO: Boeing has flown its newly designed A/MH-6X light-turbine helicopter for the first time, marking a significant...

, Tucson AZ: The Raytheon Missile Systems and BAE Systems Bofors' Excalibur team delivered the first production Excalibur global positioning...

, ORLANDO, FL: Lockheed Martin

, KIRTLAND AIR FORCE BASE: When he talks about his new aircraft, the CV-22 Osprey, the lieutenant colonel's face lights...