WATCH: NASA tests rocket booster that will help take humans to Mars

Thousands of people turned up to witness NASA testing out its new space rocket.

Lying on its side the rocket tested the first two minutes of flight.

This is the last engine test before NASA’s Exploration Mission 1 in 2018, when they will send an uncrewed Orion capsule on a flight beyond the orbit of the moon and back to Earth.

Eventually, NASA aims to use Orion to send humans to Mars.