Brett Baier on Friday aired a retraction for the error. You have protests in multiple cities at once, and they made an error and said the gun-toters were in one city when it was actually the other. Big deal. Even if you disagree, at least Fox News actually acknowledged the error and made a formal retraction.
Whereas the New York Times, Washington Post or CNN in the same situation scrubs their site and just pretends they never made a glaring partisan error. And only conservative news media has screen grabs saved of what was actually posted and covers the error, and holds them accountable. Whereas the Newspeak liberal media just gives them a free pass and pretends it never happened.