Cumulonimbus Clouds Cumulonimbus clouds are much larger and more vertically developed than cumulus clouds which form in a more stable atmosphere. They can exist as individual towers or form a line of towers called a squall line often present at cold fronts.
Sam Sheppard was an American physician best known as a homicide suspect in his wifeâs murder.
Shepard was a member of the first group of seven astronauts in 1959 chosen to participate in Project Mercury. He became the first American in space, with a suborbital flight aboard his Freedom 7 Mercury spacecraft on 5 May 1961. He also commanded Apollo 14 in 1971, when he landed on the Moon.