A representative from Machado's team confirmed to CBS News, the BBC's US media partner, that the organisation was behind her rescue operation. Mr Stern said the challenge in this case was getting somebody out who is as well-known as María Corina Machado - a household name in Venezuela for the opposition. To protect his future work in Venezuela, Mr Stern can only reveal so much about the trip. Mr Stern said he did coordinate with some nation states, and with intelligence and diplomatic services of several countries. Machado has said she intends to return to Venezuela, but Mr Stern said he advised her not to do that.