The aura of a special day added to the enchantment of a special place, beautiful Bryant Park in Manhattan. The weather was made to order, unseasonably cool, and a few thousand people— most of them visiting gawkers like me—adorned the grassy pallet of green.
Soon, theirs would be a chorus of screams that only teenagers can make when rock star idols, uh, well, rock!
Invigorated by a brisk four-block w…