(FILES) This file photo taken on March 12, 2015 shows Exxon Mobil chairman and CEO Rex Tillerson during a discussion on energy innovations in Washington, DC. Tillerson is US President-elect Donald Trump's top pick for secretary of state, US media reported on December 10, 2016, with NBC reporting that Tillerson has already been chosen. Tillerson, 64, is an oil executive with extensive experience in international negotiations and a business relationship with Russian President Vladimir Putin. / AFP PHOTO / NICHOLAS KAMM