"In Baghdad, anxiety over the turn of events was matched by unease over dozens of casualties in Baghdad's poor Shiite neighborhoods. In Sadr City, a slum of 2 million named for Sadr's father, hundreds gathered before Sadr's office, waving flags and chanting his name. Two U.S. tanks were parked a few hundred yards away, their barrels trained on the crowds. Residents reported clashes overnight, and an Arabic television station said fighting had renewed Tuesday evening."