The management of the Bulgarian Marine recommended to the crews of the Bulgarian ships to abstain from disembarkation in the ports of the USA. Presently, there are five Bulgarian ships in the American territorial sea waters. At the time of the terrorist attacks the `Bogdan` ship was in the port of Baltimore, which is very close to Washington. All crew members are safe and sound and the work on board is going on without problems, the management of the shipping company said. The flights from Varna to Tel-Aviv have been canceled, told Tonjo Ivanov, commandant of the Varna airport. Security control has been tightened, every piece of luggage is thoroughly checked up, especially those belonging to passengers checking in for Beirut, Kuwait and Russia.