Ug brought this to mind, going to the Roman Coliseum and killing a lion.
What moment in time would you want to bear witness to, live and there in the flesh ?
Is it behind a culvert on Bloody Lane at Antietam? Maybe at Grant's side with Lee surrendering at Appomattox Couthouse?
The moment the first caveman created a fire? Or, in the seat of the Wright Bros first flight?