Members of Russia's Youth Army military-patriotic movement and other participants attend a demonstration lesson that is part of an extracurricular educational program, which involves weapon training, first aid treatment, camping skills and other courses, in Sevastopol, Crimea, May 19, 2023. REUTERS/Alexey Pavlishak 

Members of Russia's Youth Army military-patriotic movement attend a demonstration lesson that is part of an extracurricular educational program, which involves weapon training, first aid treatment, camping skills and other courses, in Sevastopol, Crimea, May 19, 2023. REUTERS/Alexey Pavlishak 

Students attend a demonstration lesson that is part of a Russian extracurricular military-patriotic program, which involves weapon training, first aid treatment, camping skills and other courses, in Sevastopol, Crimea, May 19, 2023. REUTERS/Alexey Pavlishak 

Members of Russian military-patriotic movements attend a demonstration lesson that is part of an extracurricular educational program, which involves weapon training, first aid treatment, camping skills and other courses, in Sevastopol, Crimea, May 19, 2023. REUTERS/Alexey Pavlishak 

Students attend a demonstration lesson that is part of an extracurricular military-patriotic program, which involves weapon training, first aid treatment, camping skills and other courses, in Sevastopol, Crimea, May 19, 2023. REUTERS/Alexey Pavlishak 

Members of Russia's Youth Army military-patriotic movement put on gas masks during a demonstration lesson that is part of an extracurricular educational program, which involves weapon training, first aid treatment, camping skills and other courses, in Sevastopol, Crimea, May 19, 2023. REUTERS/Alexey Pavlishak 

Members of Russia's Youth Army military-patriotic movement wear gas masks during a demonstration lesson that is part of an extracurricular educational program, which involves weapon training, first aid treatment, camping skills and other courses, in Sevastopol, Crimea, May 19, 2023. REUTERS/Alexey Pavlishak 

A member of a Russian military-patriotic movement attends a demonstration lesson that is part of an extracurricular educational program, which involves weapon training, first aid treatment, camping skills and other courses, in Sevastopol, Crimea, May 19, 2023. REUTERS/Alexey Pavlishak 

Members of a military-patriotic movement attend a demonstration lesson that is part of an extracurricular educational program, which involves weapon training, first aid treatment, camping skills and other courses, in Sevastopol, Crimea, May 19, 2023. REUTERS/Alexey Pavlishak 

Members of Russia's Youth Army military-patriotic movement attend a demonstration lesson that is part of an extracurricular educational program, which involves weapon training, first aid treatment, camping skills and other courses, in Sevastopol, Crimea, May 19, 2023. REUTERS/Alexey Pavlishak 

Participants hold flags during a demonstration lesson that is part of an extracurricular military-patriotic program, which involves weapon training, first aid treatment, camping skills and other courses, in Sevastopol, Crimea, May 19, 2023. REUTERS/Alexey Pavlishak 

Members of military-patriotic movements and students attend a demonstration lesson that is part of an extracurricular educational program, which involves weapon training, first aid treatment, camping skills and other courses, in Sevastopol, Crimea, May 19, 2023. REUTERS/Alexey Pavlishak 

Members of Russia's Youth Army military-patriotic movement attend a demonstration lesson that is part of an extracurricular educational program, which involves weapon training, first aid treatment, camping skills and other courses, in Sevastopol, Crimea, May 19, 2023. REUTERS/Alexey Pavlishak