The hole just keeps getting deeper for the nation's airlines. Tuesday the Association of Flight Attendants authorized a strike vote. If a strike is approved, thousands of flight attendants could walk out on bankrupt carriers like United and U.S. Airways. Both airlines want to void their labor contracts. Marketplace's Hillary Wicai reports. Meanwhile despite all the toil and trouble flight attendants have been through, Marketplace commentator Rudy Maxa says a strike would get them ... nowhere.