- 1 5 C / D ) ▁No . ▁ 9 2 ▁Squadron ▁R S AF ▁( F - 1 5 S ) ▁No . ▁ 5 ▁Wing ▁R S AF ▁– ▁King ▁K hal id ▁Air ▁Base ▁No . ▁ 6 ▁Squadron ▁R S AF ▁( F - 1 5 S ) ▁No . ▁ 5 5 ▁Squadron ▁R S AF ▁( F - 1 5 S ) ▁No . ▁ 7 ▁Wing ▁R S AF ▁– ▁King ▁F ais al ▁Air ▁Base ▁No . ▁ 2 ▁Squadron ▁R S AF ▁( F - 1 5 C / D ) ▁ ▁Republic ▁of ▁Singapore ▁Air ▁Force ▁( RS AF ) ▁oper ates ▁ 4 0 ▁F - 1 5 SG ▁ 1 4 2 ▁Squadron ▁" G ry phon " ▁ 1 4 9 ▁Squadron ▁" F ight ing ▁Sh ik ra " ▁ ▁NASA ▁operated ▁two ▁F - 1 5 As ▁on ▁tri als ▁work . ▁United ▁States ▁Air ▁Force ▁operated ▁ 2 5 4 ▁F - 1 5 C / D ▁aircraft ▁( 2 2 2 ▁in ▁the ▁active ▁Air ▁Force ▁and ▁ 3 2 ▁in ▁the ▁A NG ) ▁as ▁of ▁September ▁ 2 0 1 0 . ▁ ▁B old ▁type ▁below ▁indicates ▁Air ▁Force ▁units ▁( Active , ▁A NG ▁and ▁AF RC ) ▁operating ▁F - 1 5 s ▁in ▁January ▁ 2 0 1 2 . ▁▁ ▁In ▁addition ▁the ▁US AF ▁also ▁oper ates ▁ 2 1 9 ▁F - 1 5 E ▁variants