The only way I see a US-AA merger working is following yet another Ch 11 case at US. Although US pays many of its employees slave wages, it is still a high-cost airline (in part because of its reliance on high-CASM express operations). I predict that AA lowers its costs to industry-leading (meaning better than Delta), meaning that the current US would be far too expensive to combine with AA without a third (fourth) trip thru the bankruptcy wringer for the US employees. Downside: not even another trip thru bankruptcy would fix the East/West pilot morass.