Of all the painful memories of this day five years ago the most painful is the one where I tell my then 6 year old daughter what happened. "Planes flew into buildings in New York and a lot of people died."

"But it was an accident, right?"

Forever after that moment my daughter has lived in a world where people fly planes into buildings on purpose.

Many people lost a lot on September 11, 2001. What my daughter lost was innocence. And while that may seem a small thing, I mourn it still.