>> what the heck happened? >> i saw a yellow flash, and then everything went pitch black. >> the force of the blast bent me over my desk. >> the whole back of the building just fell in on us. everyone along our set of offices has back injuries, head injuries, neck, bleeding, glass. >> i felt pain on my left side of my face, and popping noises, and it was the glass shards. >> they just kept falling. it was a horrible noise, horrible noise. ♪