FBI investigators for at least five years have routinely used a sophisticated cellphone tracking tool that can pinpoint callers’ locations and listen to their conversations

Of all the 6,700 previous top-secret files in the FBI’s online reading room, one single- page memo about a UFO report has attracted almost a million viewers

The FBI says its most viewed public record is a memo from 1950 recounting a strange story someone told an agent about three "flying saucers"

The FBI still has a difficult time monitoring Gmail, Google Voice, and Dropbox in real time. But that may change soon

Google says the FBI is monitoring the Web for potential terrorist activity. But it can't say how extensive the surveillance is.

The Federal Bureau of Investigation (FBI) has released the details of a 2009 investigation into internet activist Aaron Swartz to The Black Vault

A classified file released by the FBI shows how the agency tracked Marilyn Monroe's suspected ties to communism in 1956.

The FBI has begun to process for release a 2054 page file dating from the mid-1950s describing how the world nearly ended.

Several UFO stories appeared in the news this week, many miles and years apart. Yet they share a possible similar explanation: Earth-based remote-controlled devices.

FBI to Wikipedia: Remove Our Seal