On Memorial Day, we honor the brave men and women who gave their lives in service to our country. This year, a special tribute to our fallen heroes unfolded at NASA’s Glenn Research Center in Cleveland. After Lockheed S-3 jets were retired from military service, one S-3B Viking began supporting research missions at NASA Glenn for more than a decade. This aircraft recently left the center to embark on its final assignment at the National POW/MIA Memorial and Museum in Jacksonville, Florida. It will be placed on display to honor the 54 servicemembers lost during S-3 flight missions.