Will Haines, researcher at the University of Hawaii at Manoa, speaks to patrons on the preservation efforts of Hawaii's state insect, the Kamehameha butterfly, at Pearl Harbor Navy Exchange Earth Day Expo: Partnering for a Greener Future on Joint Base Pearl Harbor-Hickam. Earth Day serves as a reminder of the importance of environmental protection and community engagement and has been celebrated nationally since 1970. This year, more than 45 installations around the world are celebrating Earth Day with community events such as recycling drives, beach and base cleanups, 5K runs, bike-to-work initiatives, tree plantings, and environmental fairs. (U.S. Navy photo by Mass Communication Specialist 3rd Class Johans Chavarro/Released)