It was outside of the American Greetings construction site. The fire was started near the two tanks and one of them exploded. It caused windows to be blown out. Right now investigators are still trying to pinpoint the exact cause. Thats not calming the nerves of those who were here when it happened. Our Sarah Buduson dug into the background of the Construction Company. But first, kristin volk describes how the situation unfolded. Reporter chris, i spoke to a guy who works here at crocker park. He was in a parking garage behind me. That garage was next to the explosion. He said it was complete insanity. It was as if he was in a movie and a bomb had just gone off. And others farther away described the same sort of scene. There was this huge explosion. It was very loud. Very loud. Caught on so many cameras today. It was a dangerous situation. Reporter a situation that sent 250 construction workers fleeing from this American Greetings building. It caused parts of crocker park and near by H