also special agent clint watts, jim kavanagh. with me in washington, the former chief of homeland security and intelligence in the metropolitan police, now a homeland security expert at the rand corporation. katy tur, let's recap what we heard from the governor. 16 people, 10 shot, 5 of those who were shot are in critical but stable condition, but none have life-threatening injuries, which is just extraordinary. this mundt is under way. they don't know if they're looking for one person. they know this person was on the train and as they approached the station put on a gas mask, then triggered a smoke device, then started shooting. we know at least ten people were shot, don't know if there were ten shots or if there was ricochet. this was a normal, beautiful day in rush hour from brooklyn at a residential area. >> reporter: it's perhaps one of the prettiest days we've had in the city in quite some time. you're right. and the injuries as you're talking about, some reported shrapnel injuries. one of the questions i asked the commiss