It's a good thing my sister is a seasoned air traveler. After her wonderful visit here this past weekend, my parents dropped her off on Sunday at PHL for her late-afternoon flight back to MSP. She was supposed to take a lunchtime flight, but it was canceled because of the impending blizzard in the Midwest. Once she got to the airport, she learned that the replacement flight, too, was canceled, and the next flight out wasn't until Monday morning.
She phoned my parents' cell phones, trying to get them before they arrived back home, but wasn't successful (partly because my mother had accidentally left hers at home). She left messages asking for them to pick her up.
But then US Airways came to the rescue and found five seats for passengers without checked luggage, for which my sister qualified. She called my parents, relayed the good news and made it back home -- just in time to contend with the slippery drive south from Minneapolis.