FILE PHOTO: An assembly worker works on 2015 Ford Mustang vehicles on the production line at the Ford Motor Flat Rock Assembly Plant in Flat Rock, Michigan, August 20, 2015. REUTERS/Rebecca Cook
FILE PHOTO: An assembly worker works on 2015 Ford Mustang vehicles on the production line at the Ford Motor Flat Rock Assembly Plant in Flat Rock, Michigan, August 20, 2015. REUTERS/Rebecca Cook