To residents of Maryland, catching an occasional glimpse of a huge white blimp floating in the sky is not unusual. For more than a decade, the military has used the state as a proving ground for new airships destined for Afghanistan or Iraq. But less known is that the test flights have sometimes served a more secretive purpose involving National Security Agency surveillance.
Back in 2004, a division of the NSA called the National Tactical Integration Office fitted a 62-foot diameter airship called the Hover Hammer with an eavesdropping device, according to a classified document published Monday by The Intercept. The agency launched the three-engine airship at an airfield near Solomons Island, Maryland. And from there, the blimp was able to vacuum up “international shipping data emanating from the Long Island, New York area,” the document says.