Here are some of the horific photographs, during the tragedy, and the aftermath. There are also photographs of The World Trade Centre, before it happened.

Second plane about to crash

Second plane hitting South Tower

Cloud of concrete raining down

Emergency services during ordeal

Grey cloud darkening New York

Searching for surivors

Taking a well deserved rest

Praying in front of the White House

Confused

Mourning

Resting a while

Prayer

Towers from Hudson Bridge

The Plaza

Looking down from the sky

Looking up

Hudson River view

The North Tower

The Lobby

Lit up at night

Hudson river view

Night of completion in 1973

The view from the top

Empire State Building with World Trade Centre in background