"As I have said many times the Iran deal was one of the worst and most one-sided deals the United States has ever entered into," said Donald Trump in his speech on Friday announcing that he did not intend to re-certify the Iran nuclear deal. Trump is not always a paragon of consistency, but in this case, he tells no lie. He has consistently railed against the Iran deal since the beginning of his presidential campaign, vowing to "renegotiate" it when in office. So how did we get here?

What does the deal contain?

After years of false starts, failed negotiations and accusations that Iran was violating the non-proliferation treaty they had ratified in 1970, the agreement, known as the Joint Comprehensive Plan of Action was struck in 2015, bringing together the United States, Iran, France, Germany, the United Kingdom as well as the previously recalcitrant China and Russia.