Marines with Marine Wing Support Squadron 374, based out of Twentynine Palms, Calif., work on a new water purification system at the Chocolate Mountains Aerial Gunnery Range in MCAS Yuma region, Aug. 9. The lightweight purification water recycling system uses 3,000 gallon collapsible tanks that pump and filter out clean water which allows Marines to better conserve resources. - Marines with Marine Wing Support Squadron 374, based out of Twentynine Palms, Calif., work on a new water purification system at the Chocolate Mountains Aerial Gunnery Range in MCAS Yuma region, Aug. 9. The lightweight purification water recycling system uses 3,000 gallon collapsible tanks that pump and filter out clean water which allows Marines to better conserve resources.