By Joey Roulette and Eric M. Johnson (Reuters) -Private rocket company SpaceX fired at least five employees after it found they had drafted and circulated a letter criticizing founder Elon Musk and urging executives to make the firm’s culture more inclusive, two people familiar with the matter said. SpaceX did not immediately respond to a Reuters request for comment. The New York Times reported on Thursday that SpaceX had fired employees associated with the letter, citing three employees with knowledge of the situation. It had not detailed the number of employees who had been dismissed. SpaceX…