enforcement. people who put their lives on the line every day to keep the streets safer, but what we've basically seen is that when drug law enforcement takes the key players out of the market, there's a mad scramble to try and obtain or increase market share for the lucrative illegal markets. so conventional wisdom has been that police keep a lid on it, when according to the scientific literature, it suggests that when you take out key cartel members or even a dealer off the corner, turf wars ensue. gregg: let me go to john walters. as i understand it, you're pretty skeptical of this study. do you think it's been misconstrued, is it flawed? >> it's dumb and dumber. i mean, nobody believes this, there's not even a child -- i mean, things have changed dramatically on the streets of new york city, the country of colombia, repeatedly, where you finally challenge illegal violent groups, whether it's drug groups or other gangs, to reestablish the rule of law, yes, there is a period,