-27J, C-23, C-130, and other aircraft and the RQ-4 Global Hawk Block 30,??? the OMB memo said. ???Retaining large numbers of under-resourced aircraft in the fleet in today's fiscally constrained environment would significantly increase the risk of a hollow force.???Preventing the retirement of the C-23 aircraft in 2013, for example, would cost $343.5 million for modernization and service life exte