"There's no room to die," complained a woman, surveying the crowd of several hundred antiwar protesters that by 8 a.m. Wednesday were crammed inside the metal barricades strung up by police along the perimeter of Rockefeller Center on Fifth Avenue. Instead of being able to flood into the plaza and stage a mass die-in to dramatize the death of innocent Iraqis, they were once again being penned in by the NYPD. "Break it up, keep moving," a cop ordered, shoving back the protesters who spilled into 49th Street. "No war, no profits, no business as usual!" chanted the demonstrators, circling...