The White House home page: A warning or an unwitting prophecy?

There’s something very odd about the image at the very top of the White House’s official homepage. 

I went to the official White House homepage looking for a transcript of Biden’s press conference today. (No transcript there, so far.) I was immediately struck by the visuals at the top of the home page. So I ask you, is this a warning, a threat, an unwitting prophecy, or am I reading way too much into it?