NASA rules out regarding adding of crew for the SLS rocket launch in 2019.
NASA's Mars journey will initiate its qualification test on the world's most powerful rocket, the Space Launch System (SLS), on June 28.
Mars Base Camp is about to set up a laboratory in Mars orbit by the year 2028, therefore astronauts are needed to be sent there to work by 2028.
NASA's Space Launch System is set to be completed in Nov. 2018, and could hold the key to future Mars and deep space missions.
