Blue Origin, the space company founded by Amazon executive chairman Jeff Bezos in 2000, has been testing prototypes of its New Shepard rocket and capsule for more than a decade. After 15 successful test flights without people on board, Blue Origin is set to put its spacecraft to the ultimate test: Its first human spaceflight. On Tuesday, the company plans to send Bezos, his brother Mark, aerospace pioneer Wally Funk and Dutch teenager Oliver Daemen to the edge of space, to float in microgravity for a couple minutes, and return safely.