Air Force Senior Master Sgt. Todd Kirkwood, an avionics superintendent with the West Virginia Air National Guard’s 167th Airlift Wing in Martinsburg, W.Va., gives a thumbs-up at mile 25 of the Chicago Marathon, Oct. 9, 2016. Kirkwood ran the marathon only eight months after undergoing chemotherapy and radiation treatments for cancer. West Virginia Air National Guard photo by Air Force Master Sgt. Emily Beightol-Deyerle