UGH!! When A1 and I flew United to San Diego 2 weeks after 9-11-01, we were notified by the airlines to arrive 3 hours in advance. Nobody showed up to check us into the flight until 45 fucking minutes prior to the departure time. Luckily it was a teeny tiny airport, and the morning rush included about 3 small commuter planes, and the 4 elderly security screeners were plesant AND quick.