Fbi agents firefighters rescue workers and engineers work at the pentagon crash site on september 14 2001 where a hijacked american airlines flight slammed into the building on september 11.
Twin towers roof rescue.
Hovering just 300ft above one of the twin towers the camera peers down on to the burning roof and captures the thick clouds of black smoke billowing out after the planes have gone in.
And 2 world trade center at 1 362 feet 415 1 m.
Roof is not safest option though some people were rescued from the world trade center s roof after the 1993 basement garage bombing fire evacuation plans for the buildings never included a rooftop escape.
Only 29 minutes passed between the two world trade center towers falling.
Pasquale buzzelli a survivor who claims to have been on the 22nd floor of one of the collapsing towers lived through the fall with only minor injuries.
The rescue effort continued round the clock.
As for the north tower there was nobody on the roof he said.
In one of the buildings police helicopters could have landed on the roof to take people to safety.
The roof of the south tower said hayes was totally obscured.
The california 9 11 memorial in clovis will unveil a m.
Clovis california ksee kgpe wednesday marks 18 years since nearly 3 000 lives were lost in the terrorist attacks on sept.
Rare video from ground zero on 9 11.
Cbs news photojournalist mark laganga captured the eerie scene up close.
Dr emil chynn was one of the first medics at the scene when the first plane crashed into the twin towers at just after 9am on september 11 2001.