170815-N-IL267-002 BETHESDA, Md. (Aug. 15, 2017) Matt Huffman, a naval engineer assigned to the Naval Surface Warfare Center, Carderock Division’s Advanced Power and Energy Branch, tells Lt. Gen. Michael Dana, deputy commandant for Installation and Logistics, Headquarters Marine Corps, and other visiting Marines about innovations in expeditionary solar power during a tour in Bethesda, Md. The Marine leaders were visiting Carderock along with Marines presenting their winning entries from the Marine Innovation Challenge Showcase, an effort launched last year to empower Marines and Sailors to come up with fresh ideas to increase safety and efficiency for their unit or mission. (U.S. Navy photo by Dustin Q. Diaz/Released)