Dragon space Quest

With all the rioting and protests, it is easy to overlook that a private company recently delivered astronauts to the international space station. SpaceX used the dragon 2 space ship. It is a reusable rocket system. It docked with the space station and formed an air tight seal that was safe for the astronauts to move across. 

NASA wants to privatise low earth orbit missions so it can focus bigger missions like landing people on the planet Mars. If you were wondering why we haven't already had a manned mission to Mars, I would say it is more complicated with people. You see deep space is full of high energy radiation so it would cause the astronauts to die before they arrive at the planet. It is ok for robots because they are not effected by the radiation as much as people. If they were to build a interplanetary space ship, they would need to build it in space so they can make the walls thick and hard enough to deflect the radiation during the journey.