>> the plant was pretty close to a mountain range and when the pressure wave went out, it rebounded off the mountain and came back at an even more force. >> nearly everybody you talked to, no matter where they were at in las vegas, felt a tremendous hit. we realized that this was a serious, huge disaster. as you can see the damage, it really began to hit home. >> dennis todd watches from the mountaintop in disbelief. >> i was not ready for the mother load explosion when it came. it looked like nothing that i had ever seen before. >> the explosion kills two people, one whose body is never found. both are employees of pepcon who don't make it out in time. more than 350 people are injured. >> i remember one person describing it as, they were on a run, just a dead run away from the facility and as the