Oh no, don't strike! You could shut the airline down for good. No pun intended. I am sure there are so many people right now, waiting for the day to eventually take US Airways offer up to redeem their frequent flyer miles for a trip into outer space one day.
No, but seriously, US Airways offers such a unique product that it would be difficult... oh wait, there is United, but besides them, well you know the more I think about it, I almost forgot about American, American Eagle, Delta, Song, Continental, Continental Express, Northwest, Northwest Airlink, America West, Air Tran, Southwest, ATA, Jet Blue, Midwest, Spirit, and Alaska. But, besides them, I can't think of any other airline in the United States that can fill US Airways shoes if they were to vanish some day.