person to walk a tightrope across niagara falls. he teetered high above the rushing water from the u.s. to canada. rick leventhal taking it all in live. i won't ask why, but did he make it? >> he absolutely did, jamie, and images can barely do justice how impressive and powerful this walk was. the wire has already been taken down and show you the falls themselves, and the wire stretched across that gorge from here on the u.s. to canada, 1800 feet of it. nik climbed on the two inch steel cable at 10:17 p.m. eastern time last night about 4,000 people at terrapin point and 100,000 across the niagara river waiting for him to arrive and began the careful journey into the mist. when he reached the middle the famous mist was very, very