Bonner Frank Fellers, during World War II, was a Colonel who served as the USA military attaché to Cairo, Egypt. Adolph Hitler called Feller "our good source" because, for months during the darkest days of WW II, he acted recklessly in collecting and then sending military facts and gossip concerning Malta, North Africa and the Mediterranean, (learned from Allies who had trusted his discretion too much), to Gen. Wikipedia
The definitive Wikipedia entry for Bonner Fellers. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Bonner_Fellers