Shuttle Tire Signing . NASA Village . 40th Anniversary Earth Day Celebration . National Mall . Washington DC . Thursday afternoon, 22 April 2010 . Elvert Xavier Barnes Photography

NASA Village
http://eospso.gsfc.nasa.gov/EarthDay/index.php

Visit my 40th Earth Day 2010 webpage at http://elvertbarnes.com/40thEarthDay2010-WDC.html