A body language expert explains the US president’s “desperation” as he gave Mr Kim several pats on the arm. Donald Trump was “desperate to be seen to be in charge” as he met Kim Jong Un in Singapore, according to a body language expert. Analysing the historic handshake between the two leaders and the moments they shared afterwards, Paul Boross said the US president “tried to take over” during their “very, very staged” first encounter. He told Sky News: “Trump and Kim – they are not playing to each other, they are playing to their audiences back at home, they’re very clear about the messages they wanted to give.”   The final pat: Trump-Kim power play…