chemical weapons littering the sea floor. after world war ii the u.s. military had such a surplus of munitions experts say they were dumped in the water from 1946 to 1970 when it was eventually band. historians say people didn t think much about it back then because they were discarded in water so deep it was thought that they would never be disturbed but as we well know through the years humans have gone deeper and deeper in search of oil, put down utility cables and to fish and as more time passes scientists say joy danger increases. the containers could rust or degrade 3-time or metal containers used thought were totally impervious, enough time has gone by for things to start to corrode and break apart. world war ii era bomb was discovered near tampa, florida at the end of last month.