Joe Biden emotional over presidential question

In an emotional interview with talk show host Stephen Colbert, US Vice-President Joe Biden has said he has still not decided whether he will run for president.

"I'd be lying if I said that I knew I was there," Mr Biden said on Thursday.

The interview with Mr Colbert focused on how Mr Biden is coping with the loss of his son Beau, who died of brain cancer aged 46 at the end of May.

Choking up at times, Mr Biden talked about his son and his last days.