1.   A decade later, the violence of the crack trade has burned out, and murder rates have plunged.

2.   But first the heroin trade, and then the unfettered violence of the crack trade, drove out everybody with the means to leave.

3.   But the effects of the crack trade on entire neighborhoods is enormous.

4.   But then came the crack trade and everything went to hell.

5.   Federal prosecutors say that with limited resources they must focus on dealers in minority communities, where the crack trade has been the most destructive.

6.   Fewer kids are killing themselves because the crack trade has leveled off.

7.   That year Caldwell oversaw the prosecution of the Raysor Organization, a violent gang that prosecutors said dominated the crack trade in the Bedford-Stuyvesant section of Brooklyn.

8.   The answer, a decade ago, would have been crack cocaine and the heavily armed gangs fighting over the crack trade.

9.   The crack trade has receded, and crime has dropped.

10.   The crack cocaine trade has collapsed.