On December 5th, 2014, NASA scientists got one step closer to their dream of landing humans on Mars with Orion's successful test flight. One of the biggest challenges it overcame was withstanding the dreaded Van Allen radiation belt located 3,600 miles above Earth's surface. Now scientists have to come up with a way to ensure that the humans that will call the spacecraft home during the six-to-nine month long journey to the Red Planet and back, are able to do the same.