CNN) -- An American-born Muslim cleric has appeared in a video released by al Qaeda in the Arabian Peninsula. Anwar al-Awlaki, an al Qaeda r...

Stephen Hawking warns over making contact with aliens Mr Hawking says it is 'perfectly rational' to believe in aliens Aliens almost ...

Tehran, Iran (CNN) -- Iran said Sunday it fired five new types of locally-made coast-to-sea and sea-to-sea missiles in the last stage of its...

Seoul, South Korea (CNN) -- An explosion at close range, and not a direct hit, caused the 1,200-ton patrol ship Cheonan to sink last month, ...

Air Force launches hypersonic glider over Pacific VANDENBERG AIR FORCE BASE, Calif. — The Air Force has launched an experimental hypersonic ...