uss-edsall:Tracer from German anti-aircraft gun fire (flak) vividly depicted in a vertical aerial ph
uss-edsall:Tracer from German anti-aircraft gun fire (flak) vividly depicted in a vertical aerial photograph taken over the Port Militaire, Brest, France, during a night raid, possibly that of 4/5 January 1941.© IWM (C 1856) -- source link