NASA’s Orion Engineer makes mention of Van Allen Radiation Belts as a problem to be overcome on our journey of deep space exploration.

(Why they don't just ask the Apollo Moon Mission guy's how they did it is beyond me)

In the video presentation below, NASA engineer Kelly Smith explains about many of the risks and pitfalls surrounding the new Orion Deep Space Mission to the planet Mars.

Surprisingly, chief among Kelly’s concerns is whether or not his spacecraft can successfully pass through the perilous Van Allen Radiation Belts. Such is the prospective danger in fact, that NASA will have to send a dumbie craft first in order to ‘test out’ what the potential radiation effects will be on future human crews, as well as on the ship’s delicate sensors and equipment.