Chief Warrant Officer 2 Kent Frye, left, 902nd Engineer Company, and Sgt. John Shyne, 196th Maneuver Enhancement Brigade, South Dakota Army National Guard, center, make a “fuel donut” using a press made from scrap lumber as Capt. Robert Small, 196th, provides stability to the press Jan. 29, 2011, at Camp Phoenix in Kabul, Afghanistan. Part of a waste-recycle pilot program, the fuel donuts provide a renewable heat source for Afghans and help preserve the environment.