On Dec. 7, 1941, the Japanese bombed Pearl Harbor and Oahu. Engines 1, 4, and 6 of the Honolulu Fire Department responded to Hickam Field where ``two fire captains and a hoseman were killed, and six other firefighters were wounded,'' according to the Honolulu Fire Department web site. "These firefighters were awarded Purple Hearts and became the only civilian firefighters in the U.S. to receive this award."