mes ' ▁argument ▁that , ▁had ▁the ▁U . S . ▁Navy ▁been ▁war ned ▁of ▁the ▁attack ▁and ▁put ▁to ▁sea , ▁it ▁would ▁have ▁likely ▁resulted ▁in ▁an ▁even ▁greater ▁dis aster . ▁ ▁Michael ▁V . ▁G annon , ▁Pear l ▁Har bor ▁Bet rayed ▁( Hen ry ▁Hol t , ▁ 2 0 0 1 ) ▁is ▁a ▁recent ▁exam ination ▁of ▁the ▁issues ▁surrounding ▁the ▁surprise ▁of ▁the ▁attack . ▁ ▁Frederick ▁D . ▁Parker , ▁Pear l ▁Har bor ▁Re vis ited : ▁United ▁States ▁Navy ▁Communic ations ▁Int elligence ▁ 1 9 2 4 – 1 9 4 1 ▁( Center ▁for ▁C rypt olog ic ▁History , ▁ 1 9 9 4 ) ▁contains ▁a ▁detailed ▁description ▁of ▁what ▁the ▁Navy ▁knew ▁from ▁intercept ed ▁and ▁dec rypted ▁Japan ' s ▁communic ations ▁prior ▁to ▁Pear l . ▁ ▁Henry ▁C . ▁Cla us en ▁and ▁Bruce ▁Lee , ▁Pear l ▁Har bor : ▁Final ▁Jud gment , ▁( Har per Coll ins , ▁ 2 0 0 1 ), ▁an ▁account ▁of ▁the ▁secret ▁" C laus en ▁In qu iry " ▁undert aken ▁late ▁in ▁the ▁war ▁by ▁order ▁of ▁Congress ▁to ▁Secretary ▁of ▁War ▁Henry ▁L . ▁Stim son . ▁Cla us en ▁was ▁given ▁the ▁authority ▁to ▁go ▁anywhere ▁and ▁question ▁anyone ▁under ▁o ath . ▁Ult imately , ▁he ▁tra ve led ▁more ▁than ▁ 5 5 , 0 0 0 ▁miles ▁and ▁interview ed ▁over ▁a ▁hundred ▁US ▁and