Former US diplomat Bill Richardson told the CBS This Morning show:
The objective of the trip is a private humanitarian visit. We're not representing the US Government.
This is not a Google trip. He's (Google Executive Chairman Eric Schmidt) interested in foreign policy, he's a friend of mine, and I felt it was important that there be a broader perspective of our visit, with Eric going and some other members of our staff.
There's an American detainee in North Korea, Kenneth Bae. I heard from his son who wants to get him released
More top news
Read Sadiq Khan's full victory speech, as the Tooting MP promised to be a mayor for "all Londoners".
Former footballer Frank Worthington has denied he is suffering from Alzheimer's - a day after his daughter said he was.
A list of results for London Mayor and the London Assembly