Two of the losing cities, Houston, and Dayton, Ohio, asked for an investigation.
He says it all came down to putting shuttles where the most people would see them. Also, the contenders had to show they were committed to raising money to maintain and house the shuttles.
The orbiters will be stationed near Washington D.C., LA, Cape Canaveral, and New York City.
The investigation did find a scoring mistake that would have tied Dayton with Cape Canaveral. But NASA chief Charles Bolden says even if he'd been aware of the tie, Atlantis would have still gone to the Cape, because the Cape is a better fit for the agency's science education goals.