Illegal aliens are enlisting in the military and may be granted citizenship.

Let's go back a step. First, why is it that the U.S. Department of Defense finds its necessary to recruit illegal aliens? Secondly, is it in the best interests of the United States to recruit illegal aliens? Thirdly, what per centage of recruiting represents illegal aliens? Fourth, what effect does this per centage of illegal recruiting have on our military's effectiveness?
Fifth, what should be done?