Harrison Ford honors Michael J. Fox as "the most stubborn optimist I know"

At THR's Social Impact Summit, Harrison Ford paid tribute to Michael J. Fox, calling him "the most stubborn optimist I know." The Michael J. Fox Foundation, musician John Mayer, and Stephen and Ayesha Curry were all honored at the philanthropy-focused event, held in partnership with the Social Impact Fund. Fox's foundation is dedicated to finding a cure for Parkinson's disease.