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A container ship passes floating hoses stretching from the Monte Toledo oil tanker as it delivers a shipment of Iranian crude oil to an offshore pumping station at the Cia. Espanola de Petroleos SA (CEPSA) refinery near Algeciras, a few miles from Gibraltar, on Sunday, March 6, 2016. The tanker became the first to deliver Iranian crude into Europe since mid-2012, when Brussels imposed an oil embargo in an attempt to force the Middle Eastern nation to negotiate the end of its nuclear program. Photographer: Luke MacGregor/Bloomberg via Getty Images

A container ship passes floating hoses stretching from the Monte Toledo oil tanker as it delivers a shipment of Iranian crude oil to an offshore pumping station at the Cia. Espanola de Petroleos SA (CEPSA) refinery near Algeciras, a few miles from Gibraltar, on Sunday, March 6, 2016. The tanker became the first to deliver Iranian crude into Europe since mid-2012, when Brussels imposed an oil embargo in an attempt to force the Middle Eastern nation to negotiate the end of its nuclear program. Photographer: Luke MacGregor/Bloomberg via Getty Images