News reports were awash in misinformation following an explosion at the Canada-U.S. border crossing at Rainbow Bridge near Niagara Falls.

Some U.S. media began describing it as a terrorist explosion, caused by a vehicle entering from Canada.

Every element of that preceding sentence was dispelled within hours as flat-out wrong.

There was no attack from Canada; the incident occurred entirely on U.S. soil; in fact, authorities don’t believe it was a terrorist attack at all.

That didn’t stop a candidate for president of the United States from appearing on Fox News to promote an aspect of his platform: Building a border wall with Canada.