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tell you what we know about those who were murdered about their lives, not just how their lives ended. three adults and three children at the school were killed yesterday. mike hill was the school custodian. students called him big mike. he loved the kids at the school and his job and he loved his own kids so much. there were seven of them in his 14 grandchildren as well. love to spend time with them and to cook. his family says he was just 61 years old. cynthia peak also was 61. she was a substitute teacher at the school family friend tells local station wsmv she lived most of her l...

captioning is brought to you by skechers max cushioning. do you struggle to put on your shoes when you leave the house and going audible with new max cushioning hands free sketches slipping. it's easy. just step in and go try new max cushioning handsfree sketches slipping. good evening tonight. newly released body camera video from the police officers who confronted and killed a mass shooter, the covenant school in nashville. we're going to show it to you. but first we want to tell you what we know about those who were murdered about their lives, not just how their lives ended. three...

now the people at the center of them are begging and pleading with their elected leaders to do something and do something now. a bipartisan group of u.s. senators has been trying to strike a narrow, modest deal on gun reforms, one of the lead negotiators telling me in the last hour he is cautiously optimistic that they can get something done. despite ongoing talks on capitol hill today, it is still legal in most states for an 18-year-old to buy a semiautomatic weapon. josh campbell went to a gun range to show us just what such a weapon can do. >> they are known as assault style weapo...

More disruption. this round actually breaks apart. it doesn't exit, so it's about 3000 ft per second, and all of that energy goes into the soft tissue . um, we have a piece of plastic here to reflect to do the videos , and it actually lifted the plastic up off the table with the energy aftermath. photo of the handgun round shows a relatively straight line. and through the tissue exiting the other side. but not so with around from an ar 15. it basically goes into the body and creates an explosion inside the body trauma. surgeons say the wound from an assault rifle can be catastrophic, and the w...

The human body block of 20% gelatin, and it's meant to represent the human tissues so soft tissues. cynthia burst team fires a handgun round at 1000 ft per second into the gelatin block for this particular round , you'll see the bullet coming on this side. you see this temporary cavity here happening. so that expansion is what happens in the body, and then it collapses down. so that's where your damage comes in as a team fires around from an assault rifle, we see a lot more disruption. this round actually breaks apart. it doesn't exit, so it's about 3000 ft per second , and all of that energy ...