Putin issues a nuclear warning to the West over Ukraine

MOSCOW (Reuters) -President Vladimir Putin said on Wednesday that Russia could use nuclear weapons if it was attacked by any state and that any conventional attack on Russia that was supported by a nuclear power would be considered to be a joint attack. Putin, opening a meeting of Russia's Security Council attended by top officials, said that proposals had been made to change Russia's nuclear doctrine and said he would like to underscore one of the proposed key changes. "It is proposed that aggr