an sks rifle 762 and a .9 millimeter pistol. the sks to be the firearm used in the shooting. please inform us about these weapons. >> well, you know, a rifle of that sort is commonly used in the military. so it's a military-style weapon. it's something that when fired by someone who has any training is very risky to law enforcement because it's going to fire a caliber of round that will defeat their body armor. so if you're imagining two capitol police officers out there with their handguns, it's a very formidable situation to be against and thank god for their training or this would have been a cataclysmic day for our nation's government. >> eyewitnesss say it went on for about four or five minutes