Russian president Vladimir Putin watches the Zapad-2017 war games with minister for defence Sergei Shoigu (left) and chief of the general staff of Russian armed forces Valery Gerasimov (second right) in Leningrad, Russia. Photograph:  Mikhail Klimentyev/Kremlin via Reuters

Russian president Vladimir Putin watched his country’s military take part in the major “Zapad” war games on Monday, amid continuing concern from Nato (...)