Famed tightrope walker Nik Wallenda will set out to accomplish another death-defying stunt Sunday night as he walks across the Chicago River between skyscrapers.
If you plan on tuning in for the action, here's what you should know about the daredevil and his latest stunt:
1. Wallenda will complete two separate walks. First, he'll walk from Marina City's 534-foot-tall west tower across the Chicago River to the 635-foot-tall Leo Burnett Building. Afterward, he will walk from Marina City's west tower to its east tower, blindfolded.
2. The stretch between Marina City's west tower and the Leo Burnett Building spans two city blocks.
3. The first walk will be "uphill" at a 15-degree angle. It is the steepest incline Wallenda has ever attempted.
4. There will be no net or safety harnesses to catch Wallenda if he falls. "If [the wind] gets bad enough I go down to the safety vat wire and I'll grab onto that wire and wrap around and I'll wait for help," he said.
5. Wallenda is a seventh generation member of a family of circus performers and tightrope walkers.
6. If Wallenda is successful, the Chicago stunt will break a Wallenda family record for the highest skyscraper walk.
7. On June 15, 2012, Wallenda became the first person to walk over Niagara Falls.
8. On June 23, 2013, Wallenda became the first person to walk over the Grand Canyon on a wire.
9. Wallenda's great-grandfather, Karl Wallenda, fell to his death during a high-wire walk in San Juan, Puerto Rico, in 1978. Nik Wallenda and his mother completed that same walk together in 2011 in honor of Karl Wallenda.
10. Nik Wallenda first started practicing tightrope walking at about 2 years old.
Wallenda's high-wire stunt will air live on the Discovery Channel at 6 p.m. Central Time Sunday.