I spent a while trying to figure out exactly where they walked. In Google Earth, Victoria Falls is 1.1 miles long, but they use a
Big Shot Pro line launcher to get the line over to the other side, and the Big Shot Pro can only shoot up in the air about 100 feet or so. So I imagine at a 45 degree angle, it can go about 200 feet. That's far short of the 1.1 miles they would need. (I want a Big Shot launcher, by the way.)
So I think they are going across the short way. I
think they are crossing around here, which is about 250 feet across and crosses a national border.
