The Air Force last month approved a plan to replace old F-15C/D Eagle jets with newer aircraft considered more combat capable at three Air National Guard squadrons, according to a record of decision posted today in the Federal Register . An environmental impact statement was prepared for each installation in support of the Dec. 19 ROD, the notice stated, indicating that the older aircraft are being phased out due to safety and maintenance concerns. The service will replace: 18 F-15C...