Heliborne U.S. and Iraqi troops pressed their sweep through a 100-square-mile swath of central Iraq on Friday in a bid to break up a center of insurgent resistance, the U.S. military said. No casualties were reported on either side. “We believe we achieved tactical surprise,” Lt. Col. Edward Loomis, spokesman for the 101st Airborne Division, said of the day-old Operation Swarmer, the biggest air assault here in three years. He said about 40 suspects were detained, 10 of whom were later released. Full Story