surgery, it's not clear how extensive the damage is to his arm. >> i'm asking darin. >> the gunman is in the hospital, i'm sure. police agencies not only in philadelphia but across the country will want to know what's in his mind. >> the police officer gets shot three times, get out of the car. hits the suspect. de hit the suspect three times? >> sounds like he hit him three times. at the audio -- sdw >> then he calls 911. >> that's the officer radioing at the same time. you hear him describing his own condition in that audio report. it's unbelievable, what this officer did out there. >> i know you're shortly going to take off for philadelphia to find out more. >> i am. >> thank you so much. gun violence also at the center of cnn's town hall with president obama lobbying for tighter gun measures. people on both sides of the issue took part in a cool-headed conversation. the one glaring absence, the nra. the nation's largest gun rights