Tightrope walker crosses Niagara Falls

Daredevil Nik Wallenda has become the first person to walk on a tightrope across the Niagara Falls.

Wallenda took steady, measured steps for 548m across the mist-fogged brink of the roaring falls separating the US from Canada.

"This is what dreams are made of, people," Wallenda said shortly after he began walking the wire.

The seventh-generation member of the famed Flying Wallendas had long dreamed of pulling off the stunt, never before attempted.