To remember the 1974 event that drew more than five million people, the city will host celebrations focusing on the environment and Indigenous culture.
Members of the U.S. Navy Blue Angels fly in formation as they take-off in view of Mount Rainier for an air show practice, Thursday, July 30, 2015, from King County Airport in Seattle.
Members of 1st Special Forces Group and the Canadian Special Operations Regiment conduct a combined airborne operation and wing-exchange ceremony at Joint Base Lewis-McChord.