FRANKFURT, Lufthansa's pilots are on strike again. The 24-hour unrest has begun at midnight. Over 400 flights were already cancelled this morning at nine, 200 of which at Frankfurt airport. It's the third strike called by the Pilots Union of the airline in the last two weeks. Georg Sahnen, spokesman for the carrier, said the airline wishes 180 of the 1100 scheduled flights to take off using the pilots...