WASHINGTON U.S. intelligence assessments indicate that strikes on Iranian nuclear sites set the country's atomic program back by up to two years, the Pentagon said on July 2. "We have degraded their program by one to two years at least -- intel assessments inside the [Defense] Department assess that," Pentagon spokesman Sean Parnell told journalists, later adding, "We're thinking probably closer to two years." American B-2 bombers hit two Iranian nuclear sites with massive GBU-57 bunker-buster