The Air Force plans to spend more than $12 billion on the KC-X next-generation tanker program over the next five years, according to service budget officials. The details are included in the service's $120 billion fiscal year 2011 budget request, which the Pentagon sent to Capitol Hill today. Overall, the service plans to spend $24.2 billion on procurement, $18.2 billion on RDT&E, $45.8 billion on operations and maintenance, $2.2 billion on military construction and $29.3 billion on personnel in FY-11,...