in oklahoma city on april 19th, 1995. >> if timothy mcveigh was looking to make a statement, then he had succeeded in the worst way possible. >> debris, glass. it looks as though emergency crews are on the scene. >> the incredible explosion that ripped apart the nine-story alfred p. murrah federal building with the force of roughly two tons of tnt. the air inside was whipped into a turning tornado on glass shards and choking black smoke. one floor pancaked onto the next crushing and trapping men, women and children below. >> the roof has collapsed. >> the second floor held a daycare center. the lucky ones staggered into the street, some barely alive. >> standing by. >> what the heck happened?