Watch the full-length episode at http://video.pbs.org/video/2365455109/?Utm_source=youtube&utm_medium=pbsofficial&utm_campaign=nama_covefullprogram (US Only) http://www.pbs.org/program/national-mall-americas-front-yard/
Premieres Tuesday, April 21, 2015 at 8 p.m. ET. Check your local listings.
Every spring, one and a half million people go to see the nearly 4,000 Japanese cherry trees that bloom on the National Mall and Tidal Basin in Washington, D.C. The National Park Service arborists dedicate three months of work almost exclusively on the cherry blossoms.