1.   The roof pillars are filled with acoustic foam to reduce wind noise, and the floor is thicker to keep out the sound of the road.

2.   The fire quickly fed on the acoustic foam insulation in the walls and ceiling.

3.   The fire quickly fed on the acoustic foam insulation in the ceiling.

4.   Within minutes, flames were fanning through the nightclub, fueled by the acoustic foam insulation.

5.   Within minutes, flames were racing through the nightclub, fueled by the acoustic foam insulation.