G20 summit: Chinese official rows with Obamas national security adviser on tarmac

US President Barack Obamas national security adviser Susan Rice was confronted by a Chinese official at Hangzhou airport, causing US Secret Service to intervene following the incident.According to a Reuters report, soon after Obamas Air Force One grounded in Hangzhou, a Chinese official tried to stop Rice from walking towards the official car meant for the US president. The official was seen speaking to her angrily when she crossed a barricade meant for the media. Sep 3, 2016