Ansel Adams had a huge influence on Robert Decker. When he was 19, Decker studied under the famous landscape photographer in Yosemite National Park. Decker now lives in Nederland. His latest endeavor is called "The National Park Poster Project," a collection of retro-style posters for all 59 national parks. He hopes to finish the project by the end of the summer to commemorate the National Park Service's 100th anniversary. Decker spoke with Colorado Matters host Ryan Warner.