For 50 years, Robert Adams has made compelling, provocative, and highly influential photographs that show the wonder and fragility of the American landscape, its inherent beauty, and the inadequacy of our response to it. Sarah Greenough, senior curator and head of the department of photographs at the National Gallery of Art, introduces American Silence: The Photographs of Robert Adams that celebrates the art of this seminal photographer and explores the reverential way he looks at the world around him and the almost palpable silence of his work.