1.  In addition, Tupolev has agreed to train Iranian pilots and open a maintenance center for its planes in Tehran, the newspaper said.

2.  The sources said night flying was considered dangerous in the mountainous region unfamiliar to the Iranian pilot.

3.  Tupolev has also committed to train Iranian pilots and to set up a center in Iran to provide services.

4.  It is the second time that an Iranian pilot has escaped by helicopter from Iran to northern Iraq.