In this interview with The World's Marco Werman, NOVA Producer Miles O'Brien describes how surveillance footage played a key role in cracking the case of the Boston Marathon bombings. But as O’Brien discovered in the course of reporting the NOVA special “Manhunt—Boston Bombers,” other cities, especially New York City, have surveillance camera networks that are far more advanced than Boston’s hodgepodge system. O’Brien recounts just how powerful those systems are and what that may portend for privacy in the future.NOVA is produced by WGBH in Boston. National corporate funding for NOVA is provided by The Boeing Company. Major funding for NOVA is provided by the David H. Koch Fund for Science, the Corporation for Public Broadcasting, and PBS viewers.