A US Admiral acting as “Red Commander” in a simulation came up with a successful attack on an American carrier group using swarm tactics.
The Pentagon re-did the scenario so the US would win...
http://www.nytimes.com/2008/01/12/washington/12navy.html?_r=0
...Which is why we should never retire the A-10 and ought to make a Naval version. I would stand in line to see the movie, "The Whole Iranian Navy vs. One A-10".