‍There’s a big question mark looming over the Iranian nuclear deal which was struck between Tehran and the P5+1 group of world powers – the US, the UK, France, China, Russia and Germany – in 2015, following US President Donald Trump’s latest assertions on Tuesday. Delivering a speech at the United Nations, Trump called the Iran nuclear deal “an embarrassment” and said he may withdraw from the accord while blasting Tehran for spreading violence in the Middle East.