A U.S. military image released by the Pentagon in Washington on June 17 shows what the Navy says is the aluminum and green composite material left behind following the removal of an unexploded limpet mine used in a June 13 attack on the Japanese owned motor tanker Kokuka Courageous in the Gulf of Oman, photographed by the U.S. military the following day on June 14, 2019. Picture taken June 14, 2019. U.S. Navy/Handout via REUTERS