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The FBI has made a deal with Clear Channel to put "most wanted" bulletins and "hot pursuit" alerts on digital billboards around the country. Predictable: The SiliconView digital billboard on the 101 was just the beginning. The future of outdoor advertising is digital billboards which can display different ads depending on time of day or current traffic conditions, for example. So it makes sense that public security would be just the latest use for these annoying monstrosities. A trial of the technology in Philadelphia led to the capture of three criminals, so the project is being expanded to 150 billboards in 20 cities across the U.S. But the real question is when Google will start brokering the ad space. (Photo by AP/Jim Mone)