Trump-Xi summit: Chinese leader receives rare welcome from US counterpart at airbase

Leaders of the United States and China will talk trade, artificial intelligence and Taiwan at the White House. But there is some headway ahead of leader-level discussions - with the US treasury chief announcing agreement on extending a truce on trade. US President Donald Trump was at Joint Base Andrews to greet Chinese President Xi Jinping, in the first such presidential gesture in decades. Nick Harper and Olivia Siong report from Washington DC.