More than 40 million Russians are taking part in a three-day emergency drill to prepare the huge nation in the case of a man-made or natural disaster.
The massive operation is being run by the country's Emergency Ministry and involves more than 200,000 specialist rescue units and 50,000 pieces of equipment throughout the country.
Civil defence bodies will practice moving people and cultural valuables to safe areas, checking equipment and evacuation plans before meeting to ensure vital economic services are kept operating in the case of a chemical or biological attack or natural disaster.
Images on the Emergency Ministry website show people with convoys of trucks or engaged in operational drills.
Emergency minister Vladimir Puchkov said the exercise was designed to show regions around the country have the resources to respond swiftly to a disaster.