The US Army is developing its most powerful laser yet that is a million times more powerful than current systems. Most laser weapons fire a continuous beam until a target melts or catches fire, but the Tactical Ultrashort Pulsed Laser (UPSL) for Army Platforms will emit short, pulse-like bursts. It's being designed to reach a terawatt for a brief 200 femtoseconds, which is one quadrillionth of a second, compared to the 150-kilowatt maximum of current systems. Even for that infinitesimal amount of time, the UPSL could vaporize the surface of a drone. It's also thought such a burst would disrupt nearby electronics systems, making it a functional electromagnetic pulse (EMP).