U.S. Marine Corps Staff Sergeant Matthew Grant with

U.S. Marine Corps Staff Sergeant Matthew Grant with Alpha Company, 4th Amphibian Assault Battalion, 4th Marine Division, Marine Forces Reserve finds his footing with the guidance of a Republic of Korea (ROK) Marine Corps rappelling instuctor before decending 90 feet to the ground below at the ROK Mountain Warfare Training School near Pohang, South Korea during Korean Marine Exchange Program 15-8 as a part of Peninsula Express 15, July 6, 2015. Peninsula Express is one in a series of regularly-scheduled combined, small-unit, tactical training exercises that demonstrates continued dedication to the ROK-U.S. relationship, contributing to the security and stability of the Korean Peninsula and Asia-Pacific region. (U.S. Marine Corps photo by Sgt. Justin A. Bopp/Released)