Ashlee Vance on robot gladiators and the future of AI combat

Ashlee Vance reports from San Francisco's underground robot fight clubs, where humanoid machines controlled by virtual reality pilots battle in steel cages before roaring crowds. China dominates the hardware, America provides the spectacle, and artificial intelligence makes the robots increasingly lethal. The technology is advancing at breakneck speed — raising questions about entertainment, military applications, and what happens when these machines become truly intelligent.