Intelligence - D-Day, Barbarossa, Pearl Harbour

What theory of Phillip Davies's can apply here?

What bias did Hitler apply to his intelligence assessments?

What did Hitler do himself?

What was the name of the British deception operation for D-Day?

What three elements made up FORTITUDE?

Before Barbarossa, what did Soviet intelligence have to do?

What had happened to the Soviet intelligence service before WWII?

Was Barbarossa an intelligence failure?

What fed into the assessment which led to the US being surprised with Pearl Harbour attack?

Which operational issue fed into the Pearl Harbour surprise?

What was the codename for the US SIGINT feed on the Japanese diplomatic traffic?

What was the name of the author who wrote on Pearl Harbour?

What was used to collect on the Japanese when intercept was not possible?

How did the Japanese defeat US collection?