Researchers are warning that millions of pounds of unexploded bombs and other military ordnance that were dumped decades ago in the Gulf of Mexico, as well as off the coasts of both the Atlantic and Pacific oceans, could now pose serious threats to shipping lanes and the 4,000 oil and gas rigs in the Gulf. William Bryant and Neil Slowey, professors of oceanography at Texas A&M University, and researcher Mike Kemp in Washington, say millions of pounds of bombs are scat...