Retired Navy Captain and former shuttle astronaut Jon McBride gave Harrison a private tour of the Atlantis exhibit at the Kennedy Space Center Visitor Complex. Four-year-old &quot;small astronaut&quot;  Harrison Sheldon is the child behind a series of photos by his father, Aaron Sheldon, that have garnered national attention.  He got the opportunity of a lifetime when he was given an all-expenses paid trip to Kennedy Space Center with his family.