Original sentence: Republic of Korea Air Force:  First introduction Time : April, 1999.T-38A : Two-seat advanced training aircraft, production model, 1139 built.Turkish Air Force.United States Air Force (462 as of September 2007).United States Navy
Edited sentence: <ref name="FI_AirForces_2008">.Has 17 T-38s in operation as of November 2008.Republic of Korea Air Force:  First introduction Time : April 1999.T-38A : Two-seat advanced training aircraft, production model, 1,139 built.Turkish Air Force has 67 T-38s in uses as of November 2008.United States Air Force has 459 T-38 trainers in service as of September 2008.United States Navy has 10 aircraft in use as November 2008