Nik Wallenda back on the tightrope tonight


He was the first to walk across the Mighty Niagara, now a famed wirewalker is attempting another death defying feat.

Nik Wallenda will walk the tightrope across one of the world's most active volcanoes tonight during a two hour televised special.

The famed aerialist will cross over Nicaragua's Masaya volcano, which has erupted 13 times in the past 30 years. 

He calls it one of his most challenging stunts to date.

Wallenda notes it involves everything Mother Nature can throw at him, from high winds to heavy gases to extreme heat.

It's also the longest and highest walk he has ever attempted.