Blimps are making a comeback. According to The Intercept, they are being used routinely by the NSA for security and surveillance work.

In recent years, airships — or aerostats, as they are formally called — have been a source of major military investment. Between 2006 and 2015, the U.S. Army paid Raytheon some $1.8 billion to develop a massive missile-defense blimp called the JLENS, which is equipped with powerful radar that can scan in any direction 310 miles. (That’s almost the entire length of New York state.) In October 2015, the JLENS attracted national attention after one became untethered amid testing and drifted north from Maryland to Pennsylvania before it was brought back under control. In 2010, the Army commissioned another three airships — called Long Endurance Multi-Intelligence Vehicles — as part of a $517 million contract with Northrop Grumman. The company stated that the airships would “shape the future” of the military’s intelligence-gathering capabilities and provide a “persistent unblinking stare” from the sky.