(FILES) This file photo taken on October 07, 2015 shows Chairman and CEO of US oil and gas corporation ExxonMobil, Rex Tillerson, speaking during the 2015 Oil and Money conference in central London. 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 / BEN STANSALL