Timothy Christensen, environmental and natural resources specialist assigned to the733rd Civil Engineer Division, briefs volunteers before a shoreline planting at Fort Eustis, Va., April 19, 2016. The CED hosts the marsh grass planting every year in an effort to prevent erosion and preserve inland habitats of the installation. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)

A volunteer plants marsh grass on the shoreline at Fort Eustis, Va., April 19, 2016. The shoreline planting is one of the Earth Week events hosted by Joint Base Langley-Eustis in an effort to preserve the natural habitats the installation houses. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)

Volunteers plant marsh grass during Earth Week at Fort Eustis, Va., April 19, 2016. Throughout the week, Joint Base Langley-Eustis volunteers participated in restorative and upkeep efforts to maintain a healthy natural habitat on the installation. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)

Terry Sanders, natural resources contractor assigned to the 733rd Civil Engineer Division, plants marsh grass during an Earth Week activity at Fort Eustis, Va., April 19, 2016. Joint Base Langley-Eustis held several preservation and educational events throughout the week to promote continuous environmental stewardship. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)