The Tempest unmanned aircraft -- a Â鶹ÊÓƵ-developed system that was the first to intercept a "supercell" thunderstorm -- will be exhibited at a Capitol Hill event on Wednesday, Sept. 7, from 10:30 a.m. to 2 p.m. in room 902 of the Hart Senate Office Building, located on Constitution Avenue between 1st and 2nd Streets NE in Washington, D.C.