This is an original US Army Signal Corps "RadioPhoto" of General Alfred Gustav Jodl signing the instrument of surrender under which the remaining German forces are to lay down their arms in unconditional surrender on May 7, 1945. This starts "VE Day"!
General Jodl is at center, and I believe that's Admiral Doenitz to his left.
The scanned image doesn't do it justice. The photograph is actually much brighter and clearer that depicted.