ment ▁of ▁air power ▁in ▁the ▁Pacific , ▁which , ▁in ▁all ▁probability ▁und ou bt edly ▁will ▁be ▁of ▁extreme ▁value ▁some ▁ 1 0 ▁or ▁ 1 5 ▁years ▁hence ." ▁▁ ▁At ▁least ▁two ▁naval ▁war ▁games , ▁one ▁in ▁ 1 9 3 2 ▁and ▁another ▁in ▁ 1 9 3 6 , ▁proved ▁that ▁Pear l ▁was ▁vulner able ▁to ▁such ▁an ▁attack . ▁Admir al ▁James ▁Richard son ▁was ▁removed ▁from ▁command ▁shortly ▁after ▁protest ing ▁President ▁Ro ose vel t ' s ▁decision ▁to ▁move ▁the ▁bulk ▁of ▁the ▁Pacific ▁fleet ▁to ▁Pear l ▁Har bor . ▁The ▁dec isions ▁of ▁military ▁and ▁political ▁leadership ▁to ▁ignore ▁these ▁warnings ▁have ▁contributed ▁to ▁consp i racy ▁theories . ▁Several ▁writers , ▁including ▁decor ated ▁World ▁War ▁II ▁veter an ▁and ▁journalist ▁Robert ▁St in nett , ▁author ▁of ▁Day ▁of ▁De ce it , ▁and ▁former ▁United ▁States ▁R ear ▁Admir al ▁Robert ▁Alfred ▁The ob ald , ▁author ▁of ▁The ▁Final ▁Secret ▁of ▁Pear l ▁Har bor : ▁The ▁Washington ▁Background ▁of ▁the ▁Pear l ▁Har bor ▁Att ack , ▁have ▁argued ▁that ▁various ▁parties ▁high ▁in ▁the ▁U . S . ▁and ▁British ▁govern ments ▁knew ▁of ▁the ▁attack ▁in ▁advance ▁and ▁may ▁even ▁have ▁let ▁it ▁happen ▁or ▁encourag ed ▁it ▁in ▁order ▁to ▁force ▁the ▁U . S . ▁into ▁war ▁via ▁the ▁so - called ▁" back ▁door ". ▁However , ▁this ▁consp i racy ▁theory ▁is ▁rejected ▁by ▁main stream ▁histor