Howard Clinton Zahniser was an American environmental activist. From 1945 until his death he led The Wilderness Society as executive secretary, executive director, and editor of The Living Wilderness.
President Lyndon Johnson signs the Wilderness Act of 1964 in the White House Rose Garden. Also pictured are Interior Secretary Stewart Udall, Senator Frank Church, Mardy Murie, Alice Zahniser, and Representative Wayne Aspinall, among others.