China's Xi and a retired U.S. general have both brought up war. How worried should the world be?

As featured in NBC News

China-US relations


"There's clearly been a sharpening of the rhetoric between the two countries, and we're currently seeing a real push in a worrying direction," says Raffaello Pantucci, director of International Security Studies at the Royal United Services Institute, a think tank based in London. "There's a genuine concern it might end up somewhere horrible."