Remember the cloaking device used by the Klingon war ships in those old Star Trek television programs? Science fiction, right? Not any more. Meet the Black Fox Active Adaptive IR Stealth System, created by Israeli start-up firm Eltics Ltd., a company that produces electronic warfare systems in Ashkelon. The new technology can make a helicopter, tank or ship, vanish into thin air. Or at least, that is how it appears. The system, financed by private investors, made its debut on Channel 10 TV last week. It comes with a FLIR camera that takes a snapshot of the environment in which...