I am sorry to hear about your parents. I am 61 years old so I will get there sooner or later.

I did not know that your were a mathematics teacher! Cool!
I am honored by the invitation! I wish I could travel to faraway places, however, I am not rich enough to travel that far. LOL
I remember reading a lot about the history of Turkey (and other countries) when I was in school. I've always found it interesting that how we are so far away but so much alike in some ways but different in others...in a good way.
