New ignition lock laws aim to foil drunk drivers

Motorists convicted of driving drunk will have to install breath-monitoring gadgets in their cars under new laws taking effect in six states this week.

The ignition interlocks prevent engines from starting until drivers blow into the alcohol detectors to prove they're sober.

Alaska, Colorado, Illinois, Nebraska and Washington state began Jan. 1 requiring the devices for all motorists convicted of first-time drunken driving. South Carolina began requiring them for repeat offenders.