An early radar antenna on the roof of the Naval Research Laboratory in Washington, D.C., in the 1930s.
An ADARO unmanned system operating near the USS Oakland (LCS-24) during the Pacific Fleet’s Unmanned Integrated Battle Problem 21, which tested integration of manned and unmanned capabilities.
An LG-1K Tactical Aerial Delivery  Glider during a Marine Corps  Warfighting Lab test.
An M1132 Engineer Squad Vehicle belonging to Alpha Company, 898th Brigade Engineer Battalion, 81st Stryker Brigade Combat Team, sits under the night sky on a demolitions range at Yakima Training Center, Yakima, Wash., July 12, 2018. The M1132 is the combat engineering variant of the Stryker armored fighting vehicle.
NASA high-altitude balloon
Clint Eastwood as Air Force Major Mitchell Gant in the 1982 thriller Firefox. Gant’s character was asked to steal an advanced Soviet fighter that employed a brain-machine interface.
Sailors participate in an Apex Legends competition
 artist’s concept of the Airbus Zephyr high- altitude pseudo-satellite unmanned aerial vehicle