Officials in Hawai'i and Washington, D.C., are demanding information from the Department of Defense on more than 8,000 tons of chemical weapons that were dumped off O'ahu at the end of World War II and may still be there.

The weapons and bulk chemical containers include the lethal toxins hydrogen cyanide and cyanogen chloride and the blistering agents mustard and lewisite. In 1944 and 1945, the military dumped much of its chemical weapons supply into the oceans of the world, including waters as close as five miles from shore and as shallow as 1,000 feet deep off Wai'anae, Pearl Harbor and Honolulu Harbor.