Watch the full-length program at http://video.pbs.org/video/2365197253/?utm_source=youtube&utm_medium=pbsofficial&utm_campaign=flao_coverfullprogram (US Only)
Review the biography of the man who made public parks an essential part of American life.
Premieres Friday, June 20, 2014, 9:00-10:00 p.m. ET on PBS