Tankers sail after U.S. allows sanctions-hit COSCO unit to wind down oil dealshttps://www.reuters.com/article/us-iran-nuclear-usa-cosco/tankers-sail-after-u-s-allows-sanctions-hit-cosco-unit-to-wind-down-oil-deals-idUSKBN1X421D by simula67 • 7 years ago 1 0 7 years agoREreuters.com