Relay: Fear, Ten Years Later      It is hard to believe that a
decade has passed since I was running down the street with a
building chasing me. Ten years. While it feels like a long time
ago, I can close my eyes, and it all comes roaring back in a
second.     On Sept. 11, 2001, I was teaching high school 100
feet away from the World Trade Center. Conjuring that day — the
sounds, the smells, the taste, the feeling of time suspended,
the homeless man covered in ash pantomiming something on a park
bench — is a blurred rush, but it is the fear that I carry with
me the most.     Even writing this, my breath quickens, and I
have that sinking feeling in the pit of my stomach. That day
fostered a culture of fear, or rather, as time allots a more
critical perspective of tragedy, we simply caught up with the
rest of the world. Previous generations of Americans are
familiar with this uncertainty, having lived through world wars,
the Depression, Vietnam, the Cuban missile crisis, and the cold
war. But as recent years ha