It is said that a photograph helped launch the national parks. After Congress viewed photos of Yosemite, President Lincoln was moved to sign a bill that paved the way for the U.S. National Park Service. In Treasured Lands: A Photographic Odyssey Through America's National Parks, photographer QT Luong pays tribute to the millions of acres of protected wilderness in our country's 59 national parks.Luong, who is featured in Ken Burns's and Dayton Duncan's documentary The National Parks: America's Best Idea,...