World leaders including Trump and Zelensky gather at Pope Francis' funeral

Images of Donald Trump and Volodymyr Zelensky , hunched forward on simple chairs in the middle of St Peter's Basilica on Saturday, almost give the impression of a pair of angry bulls locking horns. But a body language expert has told MailOnline that, rather than re-enacting their furious spat at the White House two months ago, the US and Ukrainian Presidents are in fact breaking new ground.