Spc. Tiffany McClain (left) of Tulsa, Oklahoma and

Spc. Tiffany McClain (left) of Tulsa, Oklahoma and Spc. John Valdez (right), members of 720th Survey and Design Company, 120th Engineer Battalion, 90th Troop Command, Oklahoma Army National Guard, survey a future parking lot during groundwork operations at Fort Allen, Puerto Rico, June 30, 2016. This is the third iteration of horizontal engineer Soldiers from the 120th to visit the Island for their annual training to conduct groundwork operations per the request of the Puerto Rico Army National Guard throughout Camp Santiago and Fort Allen. (Oklahoma Army National Guard photo by 1st Lt. Leanna Litsch/Released)