The Air Force has compiled an $18.75 billion list of weapon systems and programs it says are critical to meeting its "required force" and are not paid for in the Pentagon's fiscal year 2009 budget request. This unfunded requirements list -- which details needs beyond the $143.9 billion Air Force spending request sent to Congress last week -- includes dozens of additional big-ticket aircraft including F-22A Raptors, F-35 Lightning II fighters, C-17 Globemaster IIIs, C-130J cargo haulers, CV-22 Ospreys and...