plate s. plates. we're trying to catch up. >> they chase the suv for about 18 minutes before gunfire erupts. >> we are in pursuit of the suspect vehicle eastbound on san bernadino avenue from richardson. we've got shots fired out the back window. >> this cell phone video shows the end of the chase. hundreds of rounds exchanged between 23 officers and the two shooters. >> right now, we have one down outside the car, one down inside the car. >> by 3:16 p.m., more than four hours after they took 14 lives, both killers are shot to death. police would later find more than 1,600 rounds of ammunition in their car and at their home 12 piem bombs. the quick action by police possibly stopping even more planned attacks. cnn, miami. >> much more from san bernadino in just a few moments. but first, let's head back to