 see how the Van Allen belts, because they'll go into those, will affect them. But after they do that for a bunch of orbits, they're going to lower the orbit down. They're going to be up for five days. And at 700 miles elevation, he and one other crew member will do spacewalks. They'll open the hatch. All four people will be in spacesuits because the air is going to leave the capsule. And he will go out and do a spacewalk. And they'll come in, and the other crew member will do a spacewalk.