July 20, 1969 was the day of a great human accomplishment. Watching the rebroadcast of bits of Cronkite’s newscast, I was struck by how much we have lost the sense of wonder that was felt around the world that day and abandoned the sense of adventure that made it possible.

But I want to talk about a different thing that happened on July 20.

On July 20, 1944, a group of German military officers and civilians made one last attempt to overthrow the Nazi regime. This one came the closest to success. As we all know, the plan was to kill Hitler and then to use a Nazi contingency plan called Operation Valkyrie (Unternehmen Walküre) to remove resistance from the regime with the regime’s own resources. Once accomplished, a new government would be established. By a series of three misfortunes, Hitler survived and the plan failed. Had any of these three not occurred, he would have died on that day and perhaps the war would have ended nine months before it did, sparing hundreds of thousands — if not millions — of lives and avoiding the forty year Soviet occupation of Germany.