Petty Officer 2nd Class Alex Luna, a crewmember of the Coast Guard Cutter Bertholf teaches a student at Alak School in Wainwright, Alaska, about boating safety and how to properly wear his life vest, Sept. 7, 2012, as part of the Coast Guard's Operation Arctic Shield. Teaching water safety techniques to remote Alaska communities is an important because many of the communities rely on subsistence harvests from the surrounding ocean for their survival. U.S. Coast Guard photo by Petty Officer 1st Class Timothy Tamargo.