It's now been a little over 16 years since the 9/11 attacks that saw plans flown in the World Trade Center in New York City. The memory of those tragic moments lives on, and we've gathered some powerful and rarely-seen photos to help us remember just how terrible these attacks were. May we never forget the innocent people who lost their lives that day.
Bystanders look up in shock and confusion as one tower begins to fall.
A photographer snapped this shot just instants before one plane hit.
This heartbreaking photo shows some people who preferred to leap out of the windows rather than stay in the building.
People flee as smoke and debris pours towards them.
A photo taken from an apartment a few blocks away.
Some people just got on with their work; the shock of what was happening hadn't even sunk in.
These panorama shots show one of the planes approaching and striking the tower.