The world's two biggest economies are on the brink of an economically destructive trade war. Here's what experts think could happen next.

A deadly railway station collapse has prompted months of large protests in Serbia. The governing party criticized the state-controlled broadcaster for covering them. Secretary of State Marco Rubio visited Panama and escalated the confrontation over the Panama Canal. He accused the country of letting China control it.

The first punches have been thrown between the United States and China in what could amount to a short-lived trade dispute with limited economic fallout or the start of yet another lengthy and painful trade war reminiscent of President Donald Trump’s first term.