Tensions rise as US-Taiwan meetings continue despite Chinese threats.

China has vowed to take "resolute and forceful measures" against Taiwan after US House Speaker Kevin McCarthy hosted Taiwanese President Tsai Ing-wen in a show of US support for the self-governed island. The US maintains there is nothing provocative about the visit, but China claims Taiwan as its own. The meeting comes as the US-China relationship has fallen to historic lows, with US support for Taiwan one of the main points of difference between the two powers.