Volunteers break in to small groups to keep track of the amount and type of trash they collect during the Earth Day cleanup on Tarague Beach April 21, 2013, at Andersen Air Force Base, Guam. Along with collecting trash, volunteers tracked the amount and brands of the waste they collected, which was sent to the U.S. Environmental Protection Agency Regions 9 for their study on sources of rubbish in oceans. (U.S. Air Force photo/Airman 1st Class Marianique Santos)