WASHINGTON -- Thousands of confidential files on the U.S. military's most technologically advanced fighter aircraft have been compromised by unknown computer hackers over the past two years, according to senior defense officials.
In addition to files relating to the aircraft, hackers gained entry into the Air Force's air traffic control systems, according to the officials. Once they got in, the Internet hackers were able to see such information as the locations of U.S. military aircraft in flight.
Most of the files broken into focused on the design and performance statistics of the fighter, as well as its electronic systems, officials said. The information could be used to make the plane easier to fight or defend against.
The plane uses stealth and other highly sensitive electronic equipment, but it does not appear that information on those systems was compromised, because it is stored on computers that are not connected to the Internet, according to the defense officials.
http://www.cnn.com/2009/US/04/21/pentagon.hacked/index.html