A full-scale exercise in Hajdú-Bihar County At the time when this film was made, civil defense exercises involving the participation of tens of thousands of people were held up and down the country....

The basics of radio broadcasting Radio communication provides us with the most important - and quite often, the only - means for the direction of fighting units and civil defense forces in a tight si...

The principal rules of preparing for a state of emergency in transportation and telecommunications The first targets that the enemy will try to take over or disable in a blitzkrieg would be the cente...