I no speaka de italian.
I decided that continuing to argue with an idiot was a waste of time; however since you've moved to this thread, I will respond (in English, your second language).
"So tell me Boris:
How would revoking all the visas have any different effect that New York's gun ban?"
Some of those citizens of terrorist nations would leave voluntarily. The rest would be on notice, and could be hunted and deported.
"How would you round up the millions of illegal aliens mixed in with 292 million legal citizens?"
For starters, anyone with a matricula counselar would be easy pickings. Owning one of these documents says "I AM AN ILLEGAL ALIEN WHO HAS BROKEN U.S. LAW."
Here in Lost Angeles, one can drive around anywhere and find groups of "day laborers" loitering on street corners, ostensibly waiting to be offered work. They are all illegal aliens. In some neighborhoods, every major street corner is occupied by six to twenty, every day. Just offhand, perhaps the INS might want to inquire about these individuals.
As for illegals who are not Mexicans, assuming they are islamic radicals who entered on the (now invalid) visas, recall that there are records of these individuals. Now we are fingerprinting them (nice change) and a little detective work might be advisable. I am not claiming that they will all be taken rapidly or easily. But, ye gods, why do we not START?
"How would you improve on Delta?"
Subcontract it to the Mossad. Or get the Mossad to train an entirely civilian force of assassins, without any restrictions, except that they must target known members of terrorist organizations, anywhere and everywhere in the world. Continually and constantly. No questions. Like I said--people dying all over the world, no warning, at night, in their beds. You might wish to review how the Israelis took out the leaders of the Olympic massacre or Arafat's chief of security for instructive examples--or the strange death of Dr. Bull, who was helping Saddam to build a 'super gun' targeted on Tel Aviv.
"How would you get nuclear power plants built fast enough to keep the terrorists from having enough funds to perform an act of terror on us tomorrow night (one of your predicted dates for 9/11 redux)?"
Won't you look silly IF they manage to pull something awful off between now and Jan 1?
We could order some from the French. We could order some from Canada. We could pass legislation and/or Presidential declaration of emergency which allows the dreary cycle of environmental impact statements, interventions, lawsuits, demonstrations, etc., to be bypassed.
"How would you seal one of the longest borders in the world even knowing that the 38th parallel is still penetrable inspite of all the force and technology we have parked there?"
(a) Condemn a one-mile-wide strip along the border and salt it with land mines.
(b) Post National Guard troops at key locations--with LOADED weapons this time, please.
(c) Revisit the idea of "defense in depth": multiple plys of electric fences might be nice.