LONDON: The US military has helped 1 billion barrels of oil leave the Arabian Gulf in the “last couple of months,” the head of American forces in the region said on Saturday. At the same time, Iran has exported “zero barrels” because of a US blockade, Adm. Brad Cooper said in a video update on the Strait of Hormuz, through which tankers carrying the oil has to pass.After the war with the US started nearly seven months ago, Iranian threats and attacks on shipping in the waterway dramatically redu