that if he can complete this extraordinary walk, 1,400 feet, 1,500 feet above the floor of the canyon below, this will be the pinnacle of his career. where do you go after walking across the grand canyon without a safety harness or net. quickly before i let you get out of here. any conditions that would stop wallenda? well, you could probably see my hair blowing. there s some strong gusts of wind up here. though wallenda camp, everyone over there says that the only thing that will stop this is lightning within the vicinity. that is his biggest worry when he s got this enormous pole, obviously can conduct that lightning. that s the only thing. right now, the last thing we ve heard, weather conditions are okay. even with this wind, he s going to have a go at it. ben fogel, a big thanks to you. watch nik wallenda s daring stunt tonight at 8:00 eastern on the discovery channel. we should note for the feint of