Why can't America play Clash of Clans?
Because they already lost two towers.
Listen up, buttercup. The joke is that America can't play Clash of Clans because it lost two towers, get it? Like the Twin Towers on 9/11? You probably think the towers are just tall buildings and don't know anything about the attack on 9/11, which is why you probably didn't understand the joke. Sheesh.