Sir Nicholas Winton organized the rescue and passage to Britain of about 669 mostly Jewish Czechoslovakian children destined for the Nazi death camps before World War II in an operation known as the Czech Kindertransport.
After the war, Nicholas Winton didn’t tell anyone, not even his wife Grete about his wartime rescue efforts. In 1988, a half century later, Grete found a scrapbook from 1939 in their attic, with all the children’s photos, a complete list of names, a few letters from parents of the children to Winton and other documents. She finally learned the whole story.
In the video [at the link] the survivors gathered to give him a wonderful surprise. Watch it all (Hat tip DR).