Up to four companies could prove their directed-energy weapons can protect military bases against small unmanned aerial vehicles in an experiment this fall that will help shape a potential acquisition program, the Air Force said this week. The experiment, to take place at White Sands Missile Range in New Mexico, will last two to three weeks starting Oct. 1, according to an April 10 invitation to participate. Michael Jirjis, who leads the Air Force Research Laboratory's directed-energy weapons experimentation campaign,...