This story notes that Delta and Northwest are about to head into Bankruptcy protection - while United and USAirways are still there. This begs the question - of the old line "major" carriers - United, American, Northwest, Delta, USAirways, Continental, how many will actually survive? Deregulation and airlines like Southwest have changed the rules in the airline business, and the surviving majors have adapted badly. I suspect that we'll see a lot of consolidation over the next 3 years - I wouldn't be at all surprised to see only 2-3 of the six I mentioned left standing after the dust settles.