As three of the former superintendents of Yosemite National Park, we are thrilled that the recent documentary series on PBS, "The National Parks: America's Best Idea," brought home to millions of Americans the extraordinary value and beauty of Yosemite National Park. Alas, the series also shed light on an environmental travesty that the people of San Francisco now have the opportunity to correct: the destruction of Hetch Hetchy Valley.
http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2009/12/07/ED2U1B0CJT.DTL