Russia is modernizing its strategic arsenal for this.
According to experts, despite their economic difficulties, Kremlin is not reducing their expenditure on arms and military training.
According to experts from the National Institute for Public Policy, Moscow's active armaments building-up may lead to the beginning of World War III.
The published report of NATO experts says that Russia is building giant command bunkers and the Kremlin is preparing for a large nuclear war.
"Moscow has expanded its arsenal by 153 nuclear warheads," - says the report.
In addition, ex-deputy chief commander of the armed forces of NATO, US General Richard Shirreff told the Polish weekly newspaper "Wprost", that Putin can demonstrate his armed aggression against the Baltic countries and Poland. According Shirreff, if that happened, the NATO troops could effectively help the NATO member countries in just a few months.
"NATO would try to respond to Russian aggression, but Putin would launch their tactical missiles on one of the NATO capitals, Berlin or Warsaw," - warned the US general.