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Carl Quintanilla previews "Cities of Success: Denver & Boulder"
CNBC's DJ Sixsmith talks with Squawk on the Street co-anchor Carl Quintanilla about the one-hour primetime special "Cities of Success: Denver & Boulder," which premieres Thursday, April 11 at 10pm ET/PT. Quintanilla discusses how these cities have positioned themselves to evolve along with the U.S. economy while combating issues that could threaten their trajectories.