"Bezos and Musk have developed an intense personal rivalry, says Ashlee Vance. "As time has gone on and these companies have been successful, ambitions have grown. Musk and Bezos used to be cordial, but they're vicious now." In 2013, SpaceX and Blue Origin fought over control of a Nasa launch pad and a patent for landing rockets at sea; Musk won both tussles. When Blue Origin tried to block SpaceX from using the launch pad at the Kennedy Space Center in Florida, Musk emailed Space News slamming the company and questioning its ability to build a rocket that would meet Nasa standards. "We are more likely to discover unicorns dancing in the flame duct," Musk wrote. After a successful Blue Origin test launch and landing in November 2015, Bezos used his first ever tweet to boast about "the rarest of beasts - a used rocket"."
Keith's note: This sounds reminiscent of the late 1800s when dueling millionaires (often called "the barons of industry") dueled with one another - but, in the process, caused America to be covered with railroads, oil fields, coal mines, telegraph, telephone, and electrical grids, and eventually roads filled with cars and skies filed with airplanes.