Excerpt - BAGHDAD, Feb 18 (Reuters) - On any given day in Baghdad, Iraqi police can be expected to report finding up to 50 bodies shot, tortured and dumped in the streets of the capital, but on Saturday only five were found, police said on Sunday. It was the most dramatic sign yet that a stepped-up military offensive by more than 110,000 Iraqi and U.S security forces is, at least for now, curbing the sectarian violence that has turned the city's streets into killing fields. There has been a relative lull in sectarian attacks since Operation Imposing Law, seen as...