▁In ▁the ▁spring ▁of ▁ 1 9 5 3 , ▁the ▁size ▁of ▁the ▁Fif th ▁Air ▁Force ' s ▁F - 8 6 ▁force ▁double d , ▁increasing ▁compet it iveness ▁among ▁its ▁pil ots ▁for ▁vict ories ▁over ▁largely ▁in ex per ien ced ▁commun ist ▁pil ots . ▁G arrison ▁achieved ▁two ▁k ills ▁in ▁May . ▁ ▁On ▁June ▁ 5 , ▁ 1 9 5 3 , ▁he ▁led ▁a ▁f ighter ▁swe ep ▁to ▁the ▁mouth ▁of ▁the ▁Y alu ▁River ▁in ▁the ▁north west ▁corner ▁of ▁" M i G ▁Al ley " ▁at ▁ 4 5 , 0 0 0 ▁feet . ▁Ob ser ving ▁approximately ▁ 4 0 ▁Mi G ' s ▁in ▁the ▁process ▁of ▁taking ▁off ▁from ▁an ▁air field ▁in ▁Man ch uria , ▁he ▁led ▁his ▁flight ▁of ▁four ▁aircraft ▁in ▁an ▁attack ▁on ▁the ▁vulner able ▁f igh ters , ▁div ing ▁at ▁Mach ▁ 1 ▁through ▁a ▁protect ive ▁top ▁cover ▁of ▁Mi G s ▁ 2 0 , 0 0 0 ▁feet ▁over ▁the ▁base . ▁Al most ▁immediately ▁he ▁shot ▁down ▁a ▁Mi G ▁at ▁low ▁alt itude , ▁followed ▁by ▁a ▁second ▁soon ▁after , ▁as ▁every ▁member ▁of ▁the ▁flight ▁scored ▁a ▁kill , ▁a ▁rare ▁if ▁not ▁unique ▁occurrence . ▁In ▁addition ▁to ▁recognition ▁as ▁the ▁US AF ' s ▁ 3 2 d ▁jet ▁ace , ▁G arrison ▁was ▁awarded ▁the ▁Dist ingu ished ▁Service ▁Cross ▁for ▁the ▁mission . ▁He ▁was