The most famous of the seven Mercury astronauts, John Glenn, is now the only survivor. As the article kindly submitted here reports, Scott Carpenter was the onl

The most famous of the seven Mercury astronauts, John Glenn, is now the only survivor. As the article kindly submitted here reports, Scott Carpenter was the only astronaut who was also (later) a deep-sea explorer, living at depth in Sealab for a month. These were the childhood heros of most Americans in my Baby Boom generation.