According to the Schiphol website KLM cancelled all flights to the Middle East due to the attacks in the USA.
A good idea imaging the terrorists are from there. They could easily board another plane. The climate already was far too bad with all the attacks in Israel and Palestina. A 767 of KLM was forced to return to Amsterdam after a fire broak out (deliberatly) in a flight to Tel Aviv.
Are there more airlines doing cancelling flights to Middle East/Israel?