A Strong Defense is the 7th level in the alien campaign. The previous version of this article states:
"QWERTYUIOPASDFGHJKLZXCVBNMQWERTYUIOPASDFGHJKLZXCVBNMWERTYUIOPASDFGHJKLZXCVBNMQWERTYUIOPASDFGHJKLZXCVBNM!!!"
Some unfortunate soul probably got stuck on this level.