"The photo of Ralph MacLean, 93, from Canada, who served during the Second World War in Hong Kong and was captured on Christmas Day 1941 has been viewed more than 1.6 million times since being posted on Imgur."
"It was uploaded with the caption: 'My veteran grandpa was asked by a little girl if he would do it all again. He said, "Yes, for you".
"Ralph met the young student on a visit to St. Patrick’s Community School in Red Deer, Alberta where he gave a talk about his wartime experiences."
"His grandson Mark Sakamoto tells FEMAIL: 'He stood and shook the hand of all 738 schoolchildren. He is 93 and simply amazing."