Pat on the back? Xi and Trump’s body language speaks volumes

Arm touches, laughs, and firm handshakes were on display as Chinese President Xi Jinping and his American counterpart Donald Trump began their high-stakes summit in Washington, which has so far featured a rare airport welcome, military pageantry and closed-door bilateral talks.

While the outcomes of the pair’s discussions are being closely watched, so are the exchanges between the leaders of the world’s two largest…