In this image made available by the British Ministry of Defence, shows the massive explosion as a World War II air dropped mine is detonated just outside Portland Harbour, off southern England, Thursday March 11, 2010. The Royal Navy Southern Diving Unit detonated the WWII 720 Kilogram German air dropped mine after it was uncovered by dredging being carried out in the harbour. (AP Photo / Dave Jenkins, MoD Crown Copyright via PA)
