The sceptics had warned that high winds or even swooping birds would down him.
But high-wire artist Nik Wallenda defied the odds to fulfil his dream by crossing over Niagara Falls on a tightrope.
A French predecessor had once walked high over the Niagara gorge, but no-one had previously made it over the brink of the falls.
Wallenda – a member of a famous family of high-wire artists – took a little over 25 minutes to complete the 550 metre crossing.
The athlete – he prefers that label to stuntman – only reluctantly wore a safety harness at the insistence of an American TV network covering the event.
He said the wind and mist made his journey very uncomfortable for a while.
But anxiety gave way to exhilaration as Wallenda reached the Canadian side to greet his family – and immigration officials who, not entirely seriously, demanded to see his passport.