Minding the machine: the AI race

The race for dominance in artificial intelligence is heating up, especially between China and the United States, but as one report says, AI "is still largely shrouded in mystery", reports Christopher Davis from New York.

It's the hottest thing in technology now, but the co-founder of Google said: "I didn't see it coming, even though I was sitting right there".

"It" is artificial intelligence - AI.