Conversation so far:
what was snake river canyon for Evel Knievel?
Knievel hired subcontractor and aeronautical engineer Doug Malewicki to build him a rocket-powered cycle to jump across the Snake River, and called it the Skycycle X-1.
What was the Evel Knievel's snake river canyon jump a launch of?
The decision was then made to have Truax build the Skycycle X-2 and have it take off and fly more like a rocket than a motorcycle.
when was the evel knievel snake river canyon jump launch?
The launch took place at the south rim of the Snake River Canyon, west of Shoshone Falls, on September 8, 1974, at 3:36 p.m. MDT.

Question: how many people watched?
Self-contained rewrite: how many people watched the evel knievel snake river canyon jump?