December 30, 2009 2:20 PM

Can a city awash in guns, grenades and explosives ever be safe?

Faux car bombs designed to check the ability of Iraqi police to spot explosives are just one of the efforts that the Iraqi government, with U.S. help, is making to protect Baghdad, a city of roughly 6 million. There are nearly 1,500 fixed and mobile checkpoints; blast walls; controversial hand-held explosive detectors; and armed security personnel on virtually every corner.

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