Allan Sheppard, John Glenn, Virgil 'Gus' Grissom, Scott Carpenter and Gordon 'Hot Dog' Cooper were amongst the first Mercury astronauts of the Space Program, apart from this, what makes this group so memorable??
No peeking below, you have to take a guess!
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Answer: They gave their names to the five Tracey brothers in the puppet show, 'Thunderbirds!'
A Quiz
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