1/3 of spacecrafts sent to Mars have been successful, and that could be your ship that doesn't make it. NASA is launching a spacecraft with four people to try to colonize Mars, which means they will not be allowed to go back to Earth. We should not go to Mars because of the risks included, death, serious injury, and massive failure.
Mars is an unforgiving place where a small mistake or accident can result in large failure, injury, or death. For example, if you accidentally go outside in space without a spacesuit you are dead. If one little mistake occurs, you could lose your whole food supply and/or the water supply. Another reason is, if you accidentally