▁pat rol ▁over ▁Man ila . ▁ ▁Un cert aint ies ▁of ▁time ▁and ▁place , ▁however , ▁made ▁it ▁doubt ful ▁if ▁the ▁ 3 d ▁would ▁accomplish ▁the ▁inter ception . ▁ ▁At ▁ 1 1 : 4 5 ▁an ▁un ver ified ▁report ▁was ▁received ▁of ▁another ▁bom ber ▁formation ▁over ▁L ing ay en ▁G ulf , ▁heading ▁south . ▁ ▁The ▁ 2 0 th ▁was ▁still ▁being ▁ref ue led ▁and ▁was ▁unable ▁to ▁take ▁off , ▁so ▁the ▁ 2 1 st ▁was ▁ordered ▁to ▁cover ▁Clark ▁Field . ▁ ▁At ▁ 1 2 : 1 5 ▁the ▁ 2 0 th ▁completed ▁ref uel ing ▁and ▁was ▁also ▁ordered ▁to ▁cover ▁Clark , ▁At ▁ 1 2 : 2 0 ▁ 5 4 ▁Japanese ▁bom bers ▁and ▁an ▁und et erm ined ▁number ▁of ▁naval ▁d ive ▁bom bers ▁attacked ▁Clark ▁Field . ▁ ▁The ▁ 2 0 th ▁was ▁in ▁the ▁process ▁of ▁taking ▁off ▁when ▁the ▁attack ▁came . ▁▁ ▁Only ▁ 4 ▁squad ron ▁aircraft ▁had ▁cleared ▁the ▁run way , ▁another ▁five ▁were ▁destroyed ▁on ▁the ▁ground ▁while ▁taking ▁off . ▁ ▁The ▁remaining ▁ 5 ▁plan es ▁were ▁destroyed ▁by ▁a ▁st raf ing ▁attack ▁after ▁the ▁bomb ard ment . ▁▁ ▁At ▁the ▁time ▁of ▁the ▁attack ▁on ▁Clark ▁Field , ▁four ▁squad rons ▁of ▁purs uit ▁plan es ▁were ▁in ▁the ▁air , ▁but ▁a ▁complete ▁break down ▁of ▁communic ations ▁occurred ▁when ▁the ▁communic ations ▁center ▁at