Russian President Vladimir Putin made a fresh nuclear threat against the West and Ukraine on Wednesday, indicating that any nation’s conventional attack on Russia that was supported by a nuclear power would be perceived as a joint attack.

       At a meeting with the Russian Security Council, Putin said that in light of an “emergence of new sources of military threats and risks for Russia and our allies,” specialists from the Defense Ministry and other government agencies had conducted a year-long, in-depth review of the country’s nuclear doctrine.