I am watching this on Discovery channel. I hope he makes it safely. He is going to walk the tight rope (a cable) across a part of the Grand Canyon. This is about to begin. I hope he makes it. If he does not, death is almost a certainty.
ETA: I am so nervous for him! I almost don't want to watch. However, the 'pre-game show' has been very educational. I did not realize the complexity of engineering involved in setting up the wire, especially in the remote Grand Canyon area. There are some stunning views of the Grand Canyon in the show. I have never seen these areas (I have been to the GCNP a dozen times).