Richard Helms was an OSS agent who went on to lead the CIA during the Johnson and Nixon administrations. [He was fired by Nixon for refusing to have the CIA intervene on national security grounds in the early days of the FBI's investigation of the Watergate break-in.]
When Allied forces accepted the German surrender, on V-E Day, Helms wrote a letter to his 3-yo son Dennis on one of Adolf Hitler's personal notecards:
Dennis,On the day Osama bin Laden was reported killed, Dennis Helms, 69, who himself had retired from the Agency, presented the letter to the CIA. It's now on display in the CIA Museum, which you most likely can't get into, because it's only for spyz.
The man who might have written on this card once controlled Europe--three short year ago when you were born. Today he is dead, his memory despised, his country in ruins. He had a thirst for power, a low opinion of man as an individual, and a fear of intellectual honesty. He was a force for evil in the world. His passing, his defeat--a boon to mankind. But thousands died that it might be so. The price of ridding society of bad is always high.