http://finance.yahoo.com/insurance/article/107188/aig-balks-at-Claims-from-jet-ditching-in-hudson

"...aviation liability insurance is different. It is activated by a finding of negligence on the part of an airline. If there is no negligence, then arguably there is no liability, and no obligation to pay claims.

That poses a problem for the passengers of US Airways Flight 1549. They suffered real losses and injuries, but they are widely perceived as having been saved from sudden, violent death by their heroic and quick-thinking flight crew, led by Capt. Chesley B. Sullenberger.

"Insurance companies try to protect their assets, obviously," said Bruce D. Chadbourne, a co-author of the book, "Introduction to Aviation Insurance and Risk Management," and a professor in the business school at Embry Riddle Aeronautical University in Daytona Beach, Fla. With the airline wearing a halo, A.I.G. "is going to play hardball."

Hey, no one put a gun to their heads and made them fly on that airline.