The Evolutionary Air and space Global Laser Engagement (EAGLE) is a missile defence plan being developed by the United States Air Force.
The project is a combination of two separate missile defense efforts: the Aerospace Relay Mirror System and a new, high-altitude airship. The project is designed as a means to destroy enemy missiles before they would have the opportunity to hit targets on American soil. It involves using either ground-based, air-based or space-based lasers deflected off a massive airship (roughly 25 times the size of the Goodyear blimp) covered in mirrors that could destroy missiles but also satellites or spacecraft in a low Earth orbit.
The first tests of the airship were scheduled to begin in 2006. Its current status as of 2011 is unknown.