US intelligence cracked the code the first day after the Japanese had changed it. After the incedent the Japanese decided it was coincidece and that there new code was still "safe"
I was just reading up on Yamamoto. and the conflicting claims by Thomas Lanphier and Rex Barber, having run across this old newspaper clipping: http://news.google.com/newspapers?nid=1243&dat=19911011&id=qNY9AAAAIBAJ&sjid=eoYDAAAAIBAJ&pg=3267,845996 Good website here, listing the crew of his "Betty" etc. http://www.pacificwrecks.com/aircraft/g4m/2656.html Thomas Lanphier - http://acepilots.com/pto/lanphier.html Rex Barber - http://www.456fis.org/P-38_REX_T._BARBER.htm
Interesting that the article mentions being shot in the head and back and still clutching his ceremonial sword.