Staff Sgt. Michael Euler, mountain warfare instructor, Marine Corps Mountain Warfare Training Center, dismounts a CH-47 Chinook Helicopter alongside a team of instructors at approximately 11,000 feet above sea level to begin a 6-kilometer long-range movement to Landing zone Red Tail as part of the Red Hat Refresher Course, May 5, 2014. The insertion began the hike which included several checkpoints that had to be located and signaled from the route. - Staff Sgt. Michael Euler, mountain warfare instructor, Marine Corps Mountain Warfare Training Center, dismounts a CH-47 Chinook Helicopter alongside a team of instructors at approximately 11,000 feet above sea level to begin a 6-kilometer long-range movement to Landing zone Red Tail as part of the Red Hat Refresher Course, May 5, 2014. The insertion began the hike which included several checkpoints that had to be located and signaled from the route.