Standing tall among classics of Cold War nuclear-paranoia literature is this deeply felt portrait of an ensemble of heroes in southern Australia, waiting for the radiation cloud unleashed by a nuclear exchange to reach their shores. Stubbornly, heroically, they cling to their humanity — to politeness and small talk, to hunting and fishing and car racing, to family and friends and the possibility of love. The moral center is Cmdr. Dwight Towers, an American submarine captain — and now the de