Douglas Dietrich is quite an insightful person from all his years of research & has been on coasttocoastam.com several times.
"WHY WAS THE US UNPREPARED?
The first warning Hawaii received that Japan might attack the US was sent by the Navy to its fleet commanders on October 16, 1941. The Army staff in Washington disagreed with the Navy's warning and the War Department sent a supplementary message to commanders advising they did not see an abrupt change in Japanese foreign policy in the near future. The War Department did not believe that Japan was on the verge of attacking the United States. Under the circumstances commanders of the Pacific Fleet saw no need to do anymore than what was already being done."
"The information, contained in a declassified memorandum from the Office of Naval Intelligence, adds to proof that Washington dismissed red flags signalling that mass bloodshed was looming and war was imminent."
http://www.telegraph.co.uk/news/worldnews/northamerica/usa/8932197/Pearl-Harbour-memo-shows-US-warned-of-Japanese-attack.html
"The Navy has traditionally followed the rule that, when international relations are critical, the fleet puts to sea. That is exactly what Admiral Kimmel did. Aware that U.S.-Japanese relations were deteriorating, he sent 46 warships safely into the North Pacific in late November 1941 — without notifying Washington. He even ordered the fleet to conduct a mock air raid on Pearl Harbor, clairvoyantly selecting the same launch site Admiral Yamamoto chose two weeks later."
http://www.thenewamerican.com/culture/history/item/4740-pearl-harbor-hawaii-was-surprised-fdr-was-not
http://en.wikipedia.org/wiki/United_States_Office_of_War_Information#Origins
"The Navy has traditionally followed the rule that, when international relations are critical, the fleet puts to sea. That is exactly what Admiral Kimmel did. Aware that U.S.-Japanese relations were deteriorating, he sent 46 warships safely into the North Pacific in late November 1941 — without notifying Washington. He even ordered the fleet to conduct a mock air raid on Pearl Harbor, clairvoyantly selecting the same launch site Admiral Yamamoto chose two weeks later."
http://www.thenewamerican.com/culture/history/item/4740-pearl-harbor-hawaii-was-surprised-fdr-was-not
http://en.wikipedia.org/wiki/United_States_Office_of_War_Information#Origins
http://en.wikipedia.org/wiki/Pearl_Harbor_advance-knowledge_conspiracy_theory,
http://www.nationalgeographic.com/pearlharbor/ngbeyond/stories/story4.html
Peculiar things have emerged over the decades.
http://jfvrinfo.blogspot.ca/2013/09/the-city-of-honolulu-and-time-travel-etc.html
Of course, the New Pearl Harbor was another-disaster where everything just happened to go wrong.
http://desertshapes.blogspot.ca/2013/09/massimo-mazzucco-new-pearl-harbor.html
1901 & 2001
http://www.newsnet5.com/dpp/news/national/the-shooting-of-president-william-mckinley-911,
http://deadpresidents.tumblr.com/post/1103783431/terror-in-september-bookends-the-american-century,
http://flps.newberry.org/article/5423968_3_0481
Of course, the New Pearl Harbor was another-disaster where everything just happened to go wrong.
http://desertshapes.blogspot.ca/2013/09/massimo-mazzucco-new-pearl-harbor.html
1901 & 2001
http://www.newsnet5.com/dpp/news/national/the-shooting-of-president-william-mckinley-911,
http://deadpresidents.tumblr.com/post/1103783431/terror-in-september-bookends-the-american-century,
http://flps.newberry.org/article/5423968_3_0481