Sept. 11 By afternoon, it was quiet. And that may have been the most ominous sign of all. Outside the NYU hospital in downtown New Yorkjust four or five blocks from the site of the devastated World Trade Centerstaff waited for the injured to arrive. For the most part, they didnt. Theres tons of ambulances, tons of personnel, and almost no patients, said Michele Okamoto, a registered nurse handing out face masks as protection from the pervasive dust.