United Nations is a grindcore supergroup whose roots go back to at least 2005. They refer to their musical genre as "emo power-violence."
Their visually striking appearance by wearing Ronald-Reagan-masks has a far more practical reason. Since they are members of signed bands, they are so obliged to their labels, what makes it legally quite difficult to show up under another as United Nations. Whereas this name isn't far away from being legally unquestionable either. Read more on Last.fm