May 8 (UPI) -- Cuba vehemently opposed new measures adopted by the United States and accused the Trump administration of tightening "to extreme and unprecedented levels" the economic, financial and commercial embargo imposed on the island since 1962. In an official statement, the Ministry of Foreign Affairs condemned the Treasury Department's decision to add Cuban entities Gaesa and MoaNickel S.A. to the Specially Designated Nationals List, a measure stemming from the executive order signed by