I still lived in Germany when this happened and felt physically and emotionally a little removed from the events since it happened so far away from me. Like, I remember coming home from work and thought my bf was watching an action movie. Even in my 20s I could not comprehend fully what I was witnessing live on tv. I cried like a baby when it started to sink in, and I felt so heartbroken for everyone involved.

I have seen and heard all kinds of video and audio footage from that day, lots of it terrifying and devastating, and I would be in tears and heartbroken every single time. Still, I was not prepared for this documentary.

It was a little too well done. It was so intimate and real, the abject terror, utter helplessness and magnitude of the events came across too strongly for me. My anxiety skyrocketed within the first 10 minutes of the cold open.

The sense of impending doom and panic I felt in the second episode, when the towers collapsed, was too much. I had to turn it off and collect myself. I felt like I was teetering on the edge of a panic attack. I was hyperventilating and crying. My heart hurt so bad for all those poor people that died and/or lost someone.

The survivor's accounts are by far the worst. It's so, so, so painful to listen to their stories. If you're even just a marginally empathetic person, this will wreck you and ruin your day.