Is NASA Building a Big Rocket to Nowhere?

When NASA puts a human on Mars, a mission scheduled to take place from 2035 to 2040, the plan is to travel there with the aid of the largest rocket in space history. Taller than the Statue of Liberty, the Space Launch System (SLS) is an integral part of NASA’s Orion program, which plans to orbit the moon, rendezvous with asteroids, and eventually take humans to Mars.