A stronger relationship between the two will trigger another headache for the US, but this time in its own hemisphere.
The first of five Iranian tankers carrying fuel for gasoline-starved Venezuela entered the South American country's exclusive economic zone.
US Navy warns it will take "lawful defensive measures" against vessels in Mideast that come within 100 metres of its warships.
Opponents said prohibiting flights would simply make it harder for Cuban-Americans to visit their families outside the capital, without making a significant impact on the Cuban government.
President Hassan Rouhani says Tehran will continue to reduce its nuclear commitments until European parties to the pact save it by protecting Iran's economy from US penalties.
The UK's marginally increased naval pressure on Iran is not likely to make waves in the Gulf, but it does serve as a good example of a shifting tide in global influence.
Authorities in Gibraltar intercepted the Iranian supertanker which was believed to be breaching European Union sanctions by carrying a shipment of Tehran's crude oil to Syria.
The drone attack targeted Abha regional airport, which has repeatedly been hit by the Yemeni rebel group in recent weeks.
Iran has exceeded the upper limit of its low-enriched uranium reserves for the first time after the US withdrew from the accord last year. The UN's atomic watchdog also confirmed the breach in a report.
Rouhani was speaking by phone to his French counterpart Emmanuel Macron, as Tehran and Washington engaged in an escalating war of words following Iran shooting down a US drone last week.
US President Donald Trump says his country was "cocked and loaded" to hit three sites in Iran in response to downing of a US drone but he cancelled the attack after being told 150 people would die.
The two archrivals have recently been firing off salvos against each other, increasing tension not only in the Gulf but also around the world.
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