The Air Force needs to strike a balance in its purchases of new fifth-generation fighter aircraft, Chairman of the Joint Chiefs of Staff Adm. Michael Mullen said today. In his comments, though, Mullen mentioned only the multiservice F-35 Joint Strike Fighter, not the F-22A Raptor -- a favorite of dismissed Air Force Secretary Michael Wynne and Chief of Staff Gen. T. Michael Moseley -- at a breakfast with reporters in Washington this morning. In the past few days, there have...