Keneth Miles describes Lott and Lehrer's claims that crime increased in Washington DC after the gun ban as an excellent example of cherry picking.
Earlier, I observed that the only justification Lott offered for another claim he made about DC crime, that Baghdad had fewer murders was "presumably Rumsfeld knows whether the number of murders is greater or less than 200 a month". Wyeth has found that the Baghdad city morgue handled 470 gunshot deaths in July. For comparison, metropolitan Washington has a similar population to Baghdad and about 20 gunshot murders each month. It would seem that all the AK47s floating around Baghdad haven't reduced crime that much.