I haven't heard the USAF might not get any JSFs but rather that the CTOL version could be cancelled and that the USAF would have to buy the more expensive carrier version ($60 mil. vs. $45 mil.). For awhile there were also rumors the USAF would split its order between conventional and V/STOL(Marine version) versions. The most recent i have heard (this week) is that the USAF will still get the conventional take off/landing version, partly because this is the version with the most export potential, (and the entire JSF program depends very much on exports) and of course partly because USAF brass wants nothing to do with a heavy, less well performing carrier variant.