Tonight, lots of eyeballs will be on Nik Wallenda as he tries to walk a tightrope over these waterfalls from Canada to the U.S.  They say conditions are right for the first-ever attempt.  I doubt if he would be able to attempt the feat if he tried it on this evening in early May.  The mist was so heavy from Horseshoe Falls that the naked eye could barely see the falls behind it.  The setting sun, though, brilliantly lit up the overheads clouds.