Remarkable Photos from September 11, 2001

This weekend marks twenty years since 9/11, where terrorist attacks shocked the world and changed the course of events around the globe.  Most of us that were alive remember where we were on that morning. It felt surreal and gripping, a day full of fear and mystery and anxiety.

Below are some remarkable photographs to remember the horrific events of September 11, 2001.

Via The New York Times , National Geographic, and CNN: