Rapid deployment of 'Project Sheriff' rocket-propelled grenade defense system tested at Dahlgren could save American lives in Iraq There's a new sheriff in town. And it did some pretty impressive "RoboCop" shooting Friday at Dahlgren. A super-fast shield designed to protect American troops from rocket-propelled grenades that's becoming part of a platform nicknamed "Project Sheriff" succeeded in its first live-fire test as 140 VIPs and members of the media looked on. The prototype demonstration of what's being called "whiz bang" tech by some was conducted at the Naval Surface Warfare Center Dahlgren Division on the heels of similar Israeli experiments...