The Air Force is planning a major restructure to its combat air fleet that includes a "smaller, but more capable force" of fighter jets mixed with unmanned drones, senior service officials announced this week. The initiatives -- outlined in the service's fiscal year 2010 budget proposal, which was sent to lawmakers on Capitol Hill this week -- include the retirement of hundreds of legacy aircraft and the purchase of just 10 new fifth-generation fighters "We're looking at the opportunity in...