The US Air Force is ready to switch to biofuels to help power its warplanes but the price of alternative fuels remains too high.
An unidentified small civilian aircraft flew into restricted airspace on Saturday, sparking an alert.
After Wednesday's successful satellite launch, Iran sets its sights on putting a monkey into space this summer.
The black beret, introduced 10 years ago, proved deeply unpopular with American soldiers.
When it comes to keeping tabs on terrorists, the U.S. military is discovering small is beautiful.
Jack Sparrow beware: A Navy software program combines multiple data to pinpoint areas at risk of pirate attacks.
According to a new book, the Roswell incident of 1947 wasn't a crashed flying saucer, it was an elaborate Soviet plot to cause mass panic in the U.S.
John Demjanjuk, 91, is unlikely to live out the five years of his sentence for being an accessory to murder of almost 30,000 people.
You don't need to see a photo of Osama bin Laden dead. A picture might have been worth a thousand words, but these days technology may trump a photograph.
Conspiracy theorists prefer complex mysteries over simple truths, and find mystery where none exists.