Meet Tina Guerrero, NYPD's only female counter-sniper
In our series, Profiles in Service, we highlight Americans who dedicate their lives to helping others. The New York City Police Department's elite Emergency Service Unit is like a SWAT team. It handles a wide range of scenarios, from hostage situations to rescues and presidential security. Detective Tina Guerrero is one of the roughly 500 members of the ESU. Only 10 are women. She is also the only female counter-sniper in the NYPD. Norah O'Donnell met up with Guerrero and joined her team on a training exercise to the top of the Brooklyn Bridge.