9/11 feelings

I really remember 9/11 because that was the day my sister was born. I remember that when we heard the news about it, my family and I were in Burger King. I was jumping around and was all happy, but, everyone beside me was angry and sad. I was confused and wanted to know why, I asked and they told me but it didn't really register with me. All I understood was that, people had died, but none of my family or anyone I knew. So I was happy about that and I thought everyone else should have been too, but they weren't. It wasn't until a couple years after that it finally hit me, people died, and I should have been sad. I still feel guilty to this day that I didn't feel sad.