on 9/11 a 3rd building fell. Announced live before it even happend

On Sept 11, 2001
The two world trade centers were hit by planes.
A 3rd building also fell that day.

Just next to the 2 world trade towers Building 7 fell.
It was NOT hit by a plan and only one floor was on fire.

Building 7 was a 47 story steel structured high rise.
It was announced on the air live that it collapsed.

It was announced 20 minuites before it fell