Police Commissioner Ray Kelly shared details of a drill conducted by the NYPD following one of the worst terrorist attacks this year.
When more than 60 people were killed at a mall attack in Kenya in September, Kelly and the police department used that as a learning experience.
Two detectives were sent to Africa to analyze the attack while the mall was under siege and two weeks ago the department used a closed Kings Plaza Mall in Brooklyn to create a similar situation with a shooter.
"Law enforcement knows that you have to move to the shooter and you have to move quickly and that's what we practiced. There were some hurdles and obstacles put in their way, but a lot of it has to do with getting there, assessing the situation, making a tactical plan and responding as quickly as reasonably possible,” Kelly said.
Kelly says the NYPD did a similar study of terrorist attacks in India in 2008.