Imperial War Museum to mark 20th anniversary of 9/11

Museum plans series of events to mark anniversary of al-Qaida attacks on US that claimed almost 3,000 lives

Many can remember exactly where they were 20 years ago when al-Qaida perpetrated the single deadliest terrorist attack in human history by deliberately crashing passenger planes into the twin towers of the World Trade Center in Manhattan.

Fewer, however, really contemplate just how much the 9/11 atrocity profoundly changed and shaped everyday life today.