Waterhouse is standing up gripping a ceiling-mounted protuberance that keeps him from being rocked right onto his can. For the last couple of minutes he has been staring at a nearby poster providing instructions on how to put on a gas mask. Waterhouse, like everyone else, is carrying one such device with him in a small dun canvas shoulder bag. Waterhouse’s looks different from everyone else’s because it is American and military. It has drawn a stare or two from the others.