*Source: ABC News (
http://abcnews.go.com/WN/story?id=3421720&page=1)*
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The roving electronic eyes, which Chicago began installing four years ago and are now going up at the rate of 15 per week, are powerful enough to read vehicle license plates and even the ticket prices listed on a sign outside the Chicago Cubs' Wrigley Field box office.
And they listen as well as look. Some of the cameras, which cost up to $30,000 apiece, are equipped with gunshot detectors that can alert police when bullets start flying. Eventually, they may even be able to sniff out biological or chemical agents in the event of a terrorist attack.
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