Why #NeverForget is gaining significance

Even if you are too young to remember September 11, 2001, you likely know that a significant event occurred that day.

It has been 15 years since nearly 3,000 people lost their lives in the attacks on the World Trade Center, the Pentagon, and a field in Pennsylvania.

The hashtag #NeverForget is trending as a tribute to the victims of the 9/11 attacks.

Survivors and families of the victims are sharing photos from that day, some of which are emotional and graphic.

The collapse of the twin towers, each 110 floors, remains a lasting memory of the tragic event.

The attacks on 9/11 resulted in the highest death toll from a terrorist incident on US soil.

People are sharing memories and final phone call transcripts of the victims to honor their lives.

The Manhattan skyline was forever changed by the destruction of the World Trade Center.

A new skyscraper, One World Trade Center, now stands at the site as a memorial to the victims.

The attacks were orchestrated by the terrorist group al-Qaeda and led to the US involvement in the war in Afghanistan.