extensive work overseas has caught the attention and gained the respect of trump. in his case he is more than a business executive. he is a world-class player. to me, a great advantage is he knows many of the mayeplayers a knows them well. under tillerson s leadership, the oil softened its stand on climate change, publicly acknowledging its existence and risks. i m not disputing that increasing co2 emission unless the atmosphere will have an impact. it will have a warming impact. how large it is what is hard for anyone to predict. reporter: tillerson, who is 64, is expected to retire as ceo of exxon mobil when he turns 65 in march. the mandatory retirement age at the company. rachel crane, cnn, new york. let s chat about this with cnn senior law enforcement analyst tom fuentes and former