The Super Bowl was sealed up tight as a drum. Chain-link fences ringed the stadium. A detail of 5,000 police was on hand. The area was declared a no-fly zone. Meanwhile, on the airwaves, CBS had decided to refuse an ad purchase by MoveOn.org, for a spot criticizing the Bush deficit. In our locked-down, buttoned-up age, everything had been done to keep things under control and let the padded gladiatorial tradition unfold seamlessly. No one expected the attack from within, when a pretty white boy who sounds black and pretty black girl who looks white gave CBS and one zillion viewers what they hadn't counted on, a glimpse of unscripted, uncensorable, naked humanity, in the person of Janet Jackson's right breast. This is America, 2004. Millions are spent to shield us from an unseen enemy who may or may not be circling waiting to strike. Millions more go into media…