The F-21As were returned to Israel when the lease expired.
IAI Kfir F-21A
VMFT-401 USMC
Israel leased 25 C1 Kfirs to the United States as adversary aircraft from 1985 to 1988. The U.S. Navy received 12 Kfirs (The Challenger Squadron) and the USMC received 13 (Snipers Squadron). They were designated F-21As.