It's a shame, he was a really cool guy. He died in the hospital from heart problems.
Last time I saw him was when I was in vacation in South Africa, he took me shooting a few times as-well. He fought in the Rhodesian Bush War with my Grandpa. He had some incredible stories to tell.
I feel especially sorry for my Grandpa, because that's the 3rd sibling of his that has died, only a few left. I fear that it may be getting to him, I'd hate to loose my Grandpa as well.