Can someone explain why this link is failing?

[DrDeth]

This is why that poor link is failing:

Why Johnny Can't Read: And What You Can Do About It: Rudolf Franz Flesch:...

[BigT]

@TroutMan

I might be the outlier. My 404 error was looking for a URL on Viglink, but it sounds like I’m the only one that got that. Oh well, I can blame it on IE, which is the other whipping boy around here.

That can happen, but it has nothing to do with the link. It most likely means the Viglink server went down for a bit–or even your DNS went down for a bit and thus your computer couldn’t find Viglink.