HONOLULU — On a search-and-rescue mission in a tsunami-stricken American Samoa village, Capt. Nate Duff and his Hawaii Air National Guard troops waded through knee-deep swampland and under trucks hanging from trees in hopes of finding missing children. Duff's medical team was the first government relief agency to reach the fishing town of Leone following the tsunami, one of dozens of American rescue squads spread throughout the wrecked islands delivering personal help, food, tents and medical supplies. "The air stunk with ... hundreds of dead fish and animals, and rotting food and debris," Duff wrote in an e-mail to his...