Today was hard

We did not do school yesterday so we made it up today.  Tara and I lit a candle this morning in remembrance of all those who died today 9 years ago.  The kids asked about it, so I told them.  It was a very hard thing to do though.  How do you explain to a 6 year old and an almost 5 year old how scary that day was?  Do you even want them to know?  I did the best I could, explaining what happened (without even mentioning Muslims).  We told them that was the reason for Daddy being away from us.  We also watched a short clip on the towers falling.  I was torn on if I would show them, but they are both pretty advanced and I figured they could handle it. They did well with the short lesson.