DARPA GREMLIN developed Flying Aircraft Carrier with launch and retrieval system of swarming UAVs to defeat A2/AD environments

​US military is facing increasingly Anti-access /Area denial environment, a set of overlapping military capabilities and operations designed to slow the deployment of U.S. forces to a region, reduce the tempo of those forces once there, and deny the freedom of action necessary to achieve military objectives . “A2/AD capabilities enabled by integrated air defense …