Marines with 7th Engineer Support Battalion from Marine Corps Base Camp Pendleton, Calif., test Improved Ribbon Bridge components with representatives from Marine Corps Systems Command, and Marine Corps Engineer School, at Production Plant Barstow's test pond aboard Marine Corps Logistics Base Barstow’s Yermo Annex, Calif., Jan. 25, 2016 - Marines with 7th Engineer Support Battalion from Marine Corps Base Camp Pendleton, Calif., test Improved Ribbon Bridge components with representatives from Marine Corps Systems Command, and Marine Corps Engineer School, at Production Plant Barstow's test pond aboard Marine Corps Logistics Base Barstow’s Yermo Annex, Calif., Jan. 25, 2016