Angela Merkel faces a "make or break" meeting with Donald Trump on Friday in which she is under pressure to bury the hatchet with the president, or risk plunging US-Germany relations to a new low.

Mr Trump and Mrs Merkel have already clashed with the US president calling her open door refugee policy "insane," while in Germany there have been deep concerns about Mr Trump's commitment to the future of Nato, and his plan to ban citizens of six predominantly Muslim entering the US.

It seems that the heady days of America's warm relationship with Germany - as famously reflected in the "bench photo" of Mrs Merkel and Barack Obama at the the G7 summit - might be long gone.

So here are five things to watch out for when Donald Trump and Angela Merkel meet on 14 March.