Here's how Kanye West landed a Super Bowl ad in several local markets, then used it to sell swastika T-shirts after it aired.

The Anti-Defamation League condemned West's antisemitism on Monday, following the promotion to his website: "There’s no excuse for this kind of behavior."

How did a low-production ad from Kanye West directing viewers to a site selling antisemitic merchandise dupe broadcasters and media buyers? Experts say the incident exposes critical failures in ad vetting and industry self-regulation.