Watch: Why is there a 'black cloud' over unity at the Nato summit?

Watch: Why is there a 'black cloud' over unity at the Nato summit? To play this video you need to enable JavaScript in your browser. This video can not be played Watch: Why is there a 'black cloud' over unity at the Nato summit? Close US President Donald Trump is in Turkey attending a Nato summit following a ramp up in tensions between the US and Iran. The latest trading of strikes were not the only topic of discussion at the summit, defence spending and Trump's reiteration of his interest in purchasing Greenland were also brought up. The BBC's Frank Gardner explains how the latest developments have cast a "black cloud" over discussions of unity at the summit. More on this story. Subsection World Published 39 minutes ago Share close panel Share page Copy link About sharing Related topics Nato Follow Nato close panel You are now following Nato Updates from your News topics will appear in My News and in a collection on the News homepage . Donald Trump Follow Donald Trump close panel You are now following Donald Trump Updates from your News topics will appear in My News and in a collection on the News homepage . Middle East Follow Middle East close panel You are now following Middle East Updates from your News topics will appear in My News and in a collection on the News homepage . United States Follow United States close panel You are now following United States Updates from your News topics will appear in My News and in a collection on the News homepage . Read description