Engineering graduate student Mithun Diddi flies a drone in the Unmanned Aircraft Systems (UAS) facility at the George J. Kostas Research Institute for Homeland Security in Burlington, Massachusetts. The blue foam panels that cover the walls and floor are designed to absorb radio frequency waves, which allows Northeastern researchers to fly and test drones in a controlled environment with no unintended radio-frequency noise or interference. Photo by Adam Glanzman/Northeastern University