Retired U.S. Air Force Staff Sergeant Dennis Provencher, airborne and ground radio operator, right, talks with a group of Airmen including Lt. Col. Daniel Waid, 18th Communications Squadron commander, left, about how much has changed since Provencher initially joined in 1951 on Dec. 23, 2019, in Okinawa City, Okinawa. Provencher is a Guinness Book of World Records holder for most amount of blood donated. (U.S. Air Force Photo by Airman 1st Class Rebeckah Medeiros)