They were Scott Carpenter, Gordon Cooper,John Glenn,Virgil Grissom, Walter Schirra,Alan Shepard and Donald Slayton.

VOA: special.2009.06.10

Shepard partnered with fellow celiac and athlete John Forberger to co-found 1in133.org and host the summit.

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American astronaut Alan Shepard made a suborbital flight later that year, and John Glenn became the first American to orbit Earth in 1962.

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