Los Angeles police Chief William Bratton (2nd R) and Mayor Antonio Villaraigosa (L) announce the opening of the National Counter-Terrorism Academy at the L.A. Police Department in March, 2008.
A decade after 9/11, we're still feeling the impact of that horrible day. We begin in Los Angeles, where three of the four planes used in the 9/11 attacks were heading. How did the attacks transform the city's police department? Reporter: Krissy Clark
Please ensure that all comments adhere to our community guidelines. We reserve the right to edit or remove comments that do not follow these guidelines.