It’s in a paragraph labelled In Popular Culture – I think it’s only making a statement about a fact in the Captain America universe, not about real life.
Wikipedia has all sorts of these little-known facts to teach us. For example, I’ll bet nobody reading this thread was aware of the full history of the beverage known as hot chocolate, or of the public figures Benjamin Franklin and Walter Cronkite.
Note that the linked LiveJournal entries contain NSFW language. The truth is profane sometimes.
Also, good job to whoever just removed the spurious Red Skull information from the Dean Rusk article. Hopefully some silly person won’t start an edit war over it.