It would seem to me that that process is already pretty extensive. And if they are illiterate, don't speak a lick of English and don't know American values. Yet somehow pass the rigorous process to become citizens. That's hard enough. Wouldn't the test already included American values? It's a process of proving you're safe enough to become apart of American culture on some shape fashion or form that is productive to its growth. The process seems solid. Our top terrorists in this country are primarily American born. Shouldn't we be vetting them?