The U.S. Navy recently announced it had stood up a 150 bed field hospital in one of the most unusual places—a cave in an undisclosed location in Norway. The hospital is just the latest of Pentagon deployments to cave systems in Norway, including U.S. Marine Corps combat equipment and even nuclear-powered attack submarines. While the cave deployments are important to help defend Norway from its bigger Russian neighbor, it also provides a secure base for operating in the increasingly open Arctic region... ..While many of these bases were explicitly built to help defend Norway, the changing climate is giving them...