Jimmy looked up, "Hey Tom, what's up?"

"Do you really think you should be doing that?"

"Oh what, this? Ronson and his men have been doing this for ages. It helps them get used to the sun on the Surface. I'm just trying to catch up to them."

"Is it safe?"

"Well, yeah. We've been putting it in the food so everyone will be able to live up here. Ronson's people have been on it and they have almost no radiation effects. So what did you really come up here ...