Dutch diver Timmo Brouwer purges the air from his regulator, alternate regulator, and lungs for a portrait at White Rock dive site near Koh Tao, Thailand on Thursday, July 28, 2016. Brouwer came to Koh Tao to become a scuba dive master, a professional certification one step below dive instructor. This was his last dive on Koh Tao and one of his first as a professional diver.