Russian President Vladimir Putin has warned of a potential nuclear war if NATO states were to militarily intervene in his conflict in Ukraine. The West should remember that Russia also has weapons that could hit targets on its territory, he told 1,000 representatives from politics, business, culture and religion at his State of the Nation address to both houses of parliament. The 71-year-old, set to be re-elected next month, emphasized that any escalation and the use of nuclear weapons could lead to the “extinction of civilization.” This was not a “cartoon film,” Putin said. NATO countries hav…