A man walks past a shell, which is the replica of the biggest detonated Soviet nuclear bomb AN-602, in...
A man walks past a shell, which is the replica of the biggest detonated Soviet nuclear bomb AN-602 (Tsar-Bomb), in Moscow, Russia, August 31, 2015. The shell is part of an exhibition organized by the state nuclear corporation Rosatom. REUTERS/Maxim Zmeyev