“Let’s start climbing,” their father said.

“Why can’t we just walk along the hall,” Sue asked, “instead of doing it the hard way?”

“You’re forgetting that the Wheel is always throwing you outward as it spins,” Mr. Shannon said. “If you tried to walk down the spoke it would be like trying to walk against a hurricane. For this reason, you two must be careful not to lose your grip on the ladder or you’ll be flung down the corridor against the rim.”

The three began climbing hand over hand along the ladder. They got along very well until Sue suddenly became dizzy and lost her hold. She screamed as she began flying down the corridor. Steve’s heart nearly stopped beating for a moment. He heard his father calling out loudly in a frantic voice: “Grab the ladder, Sue! Grab the ladder!”

At first Sue did not seem to hear and kept hollering in fright. Then she understood and reached out wildly with her hands for the nylon ladder as she swept along. One hand seized a piece of it and she held on for dear life, her body still hanging in mid-air as the force of the turning Wheel kept trying to throw her outward.

“Hold on, Sue!” her father called. “We’re coming!”

He and Steve swiftly crawled along the ladder to the spot where Sue was clinging with one hand.

“Hurry!” she cried. “I can’t hang on much longer!”

Just as she was about to let go, Steve reached her and held on to her with his free hand. Then his father lent his help and Sue was safe. She sobbed for a moment from the fright she had had and Mr. Shannon suggested that they go back to the rim where they would be safe again. Both children agreed, for they had suddenly lost all interest in the hub.

By the time they got to the Weather Control Bureau they found more worry awaiting them. Men were hustling about the huge room with serious looks on their faces. One of them was looking into the eyepiece of a large machine that was pointed out the window down onto Earth.