What goes up, must come down - even if you send it up to space three times aboard a space shuttle. Just ask our latest guest, Rex Walheim, who flew on shuttle Atlantis three times - including the last shuttle flight... ...ever. Kovi and Benjamin did their very best to keep their composure as they spoke with Rex about how he became an astronaut, what it's like up there, does space really have a burnt smell!?, and just how powerful an experience being in space can be.

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