Langley Air Force Base is home to advanced fighter jets, which were moved to another base after UAVs were spotted around it last December, a report said.

U.S. officials don’t know who is behind the drones that have flown unhindered over sensitive national-security sites—or how to stop them.

The Pentagon is confirming that unidentified drones did fly over Langley Air Force Base in Hampton.Langley is the East Coast home to F-22 Raptors, advanced fifth-generation stealth fighter jets. The 1st Fighter Wing maintains and operates half of the F-22s in the United States Air Force's inventory.