The United Nations said Friday that it has successfully completed a complex operation to transfer more than a million barrels of oil from an aging supertanker off Yemen's Red Sea coast onto a salvage vessel, averting a potential environmental catastrophe. "We have, I think against many odds, managed to complete an operation that many talked about for years," U.N. Development Program Administrator Achim Steiner told reporters in a video call. "Many were concerned it couldn't really be done. Many questioned why it took the U.N. long to implement it." The planning, f...