Photo by James Nachtwey for TIME magazine.

I will never forget staring at the screen. I was stunned. It was just a few moments after I got the phone call to turn on the TV. Then the second plane hit.

On this date, seventeen years ago, we experienced a great national tragedy in the United States. Not only in the lives that were lost in the terrorist attacks, the families torn asunder, and the emergency responders who suffered and continue to suffer terrible health problems as a result of working at the scene – but also in the way we view ourselves and our world. Over the last 12 months since 9/11/2016, 33 more first responders died of health issues related to 9/11.

In remembrance of that day, and to honor the lives that were lost, I am posting some tributes.