Rex Tillerson sworn-in as US secretary of state
Former chairman and chief executive of Exxon Mobil Rex Tillerson (64) was sworn in as Secretary of State of the United States. His appointment was cleared by full Senate approval in a 56-43 vote. Mr Tillerson does not have any political experience, but has vast experience in business diplomacy by making deals with foreign countries. He has faced intense scrutiny over his ties to Russia. Exxon Mobil Corporation is the fifth largest company in terms of market capitalization.