Microwave weapons for crowd control used to be top-secret stuff. No more. Raytheon, which makes them for the military, now promotes its Silent Guardian, a smaller version of its Active Denial system (see MWN, M/A01, p.1), on the Web. Silent Guardian is "available now and ready for action," Raytheon promises. The company even discloses its range, which used to be closely held. It can "de-escalate aggression" at 250 yards, Raytheon states in its best defense-speak. To tempt you further, you can also download a 30-second video, with an up-tempo soundtrack.