CalSTRS's Chris Ailman on calling for company overhaul at Exxon Mobil

San Francisco based investment firm, Engine No. 1 is pressuring ExxonMobil to focus more on investments in clean energy while cutting costs elsewhere to preserve its dividend. Pension fund Calstrs, which holds more than $300 million Exxon stake, is backing Engine No. 1’s decision. Christopher Ailman, CalSTRS chief investment officer, joins ‘Closing Bell’ to talk about what this means for ExxonMobil.