Jeffrey Earnhardt, right, NASCAR Nationwide Series driver of the No. 4 JD Motorsports Chevrolet, listens to James Canik, Armed Forces Medical Examiner System deputy director for administration, facilities and support, Armed Forces DNA Identification Laboratory, May 28, 2014, at Dover Air Force Base, Del. Earnhardt was briefed on how DNA was used to identify members of the Romanov family, Tsar Nicholas II, his wife Alexandra and their children. (U.S. Air Force photo/Roland Balik)
Jeffrey Earnhardt, right, NASCAR Nationwide Series driver of the No. 4 JD Motorsports Chevrolet, listens to James Canik, Armed Forces Medical Examiner System deputy director for administration, facilities and support, Armed Forces DNA Identification Laboratory, May 28, 2014, at Dover Air Force Base, Del. Earnhardt was briefed on how mitochondrial DNA is used to identify remains as part of forensic DNA testing procedures. (U.S. Air Force photo/Roland Balik)
Jeffrey Earnhardt, right, NASCAR Nationwide Series driver of the No. 4 JD Motorsports Chevrolet, listens to James Canik, Armed Forces Medical Examiner System deputy director for administration, facilities and support, Armed Forces DNA Identification Laboratory, May 28, 2014, at Dover Air Force Base, Del. Earnhardt received a briefing on DNA samples stored at AFMES. (U.S. Air Force photo/Roland Balik)
Jeffrey Earnhardt, right, NASCAR Nationwide Series driver for JD Motorsports, talks with Lt. Col. Laura Garner, left, Armed Forces DNA Identification Laboratory deputy director, May 28, 2014, at Dover Air Force Base, Del. Earnhardt and members of his crew received a briefing and toured the Armed Forces Medical Examiner System facility. (U.S. Air Force photo/Roland Balik)
Jeffrey Earnhardt, right, NASCAR Nationwide Series driver of the No. 4 JD Motorsports Chevrolet, listens to James Canik, Armed Forces Medical Examiner System deputy director for administration, facilities and support, Armed Forces DNA Identification Laboratory, May 28, 2014, at Dover Air Force Base, Del. Canik briefed Earnhardt on the mission and history of the AFMES. (U.S. Air Force photo/Roland Balik)
Jeffrey Earnhardt, second from the left, NASCAR Nationwide Series driver of the No. 4 JD Motorsports Chevrolet, talks with Paul Stone, right, Armed Forces Medical Examiner System public affairs officer, May 28, 2014, at Dover Air Force Base, Del. Earnhardt received briefings and a tour of the AFMES facility. (U.S. Air Force photo/Roland Balik)