This Is Not Drill

Today, December 7, is Pearl Harbor Day -- the anniversary of the Japanese surprise attack on Pearl Harbor, Hawaii, on December 7, 1941.

The image shows a naval dispatch sent by CINCPAC -- Commander in Chief Pacific -- to all major naval commands and fleet units. The telegram reads: "AIR RAID ON PEARL HARBOR X THIS IS NOT DRILL"

For this and related documents, have a look at the Library of Congress web site, which has links to a repository of documents relating to the events of that day, including man-in-the-street interviews by folklorists.

Franklin Delano Roosevelt's war message, delivered to Congress on December 8, 1941, is available at the FDR Library and at the American Presidency project.