I'm so sorry to hear that.
I lost family members during 9/11 because they were working in the World Trade Center when the 2 planes hit. I agree that seeing pictures of tragedies like this are very upsetting and triggering.
While I can understand the 9/11 pictures, I can't understand why the media insists on posting images of horrific tragedies like the one you described. It's more hurtful than it is helpful. In fact, I would argue that it's really not helpful at all.
I hope you're able to pull through this anniversary okay. I can only imagine how terrible it must have been.
But, I find it really helps to reminisce about the happy times... Remember all the good times you had together.

It sounds like you're doing that right now, which is awesome. It distracts from all the negative thoughts.