In a world where everything is mobile, even billboards are starting to move in surprising ways. Large advertising messages traditionally fixed to sides of buildings or planted along roadways are being freed by digital projectors and laptop computers to pop up in unexpected places.
"This is a form of advertising that's working, and we're telling cities they can regulate it and get a revenue stream," Ewen said. "And if not, we'll continue to do it anyway."
Tyler Robinson named suspect in Charlie Kirk shooting: What to know about
him and how he was apprehended - ABC News
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1. Tyler Robinson named suspect in Charlie Kirk shooting: What to know
about him and how he was apprehended ABC News
2. Live updates: Charlie...