Missouri Governor Matt Blunt signed into law Thursday legislation designed to better protect you from repeat drunken drivers. The new law requires those repeat offenders to modify their vehicles with an ignition interlock device that forces the driver to blow into a breathalyzer to start the car. It closes a loophole that previously allowed municipal DWI's not to count against a defendant. In 2005 alone, more than 31-hundred drivers were convicted of second and subsequent offenses. In the clip above, the Governor explains how the Department of Revenue will be charged with enforcing the new law.