The Wall Street Journal had an article stating that, because of taking over the pension funds, the U.S. Government will own 7% of US, between 15-35% of UA, and also will hold similar stakes in NW and DL. (Delphi was also mentioned.) It's done this in the past with Polaroid and other companies, and taxpayers made out big.
The Government waits until the stock has appreciated significantly, and then sells out. It sounds like the untold story behind pension fund takeovers by the U.S. Government.