By Guy Faulconbridge LONDON (Reuters) -Russia said on Saturday that the accelerated deployment of modernised U.S. B61 tactical nuclear weapons at NATO bases in Europe would lower the “nuclear threshold” and that Russia would take the move into account in its military planning. Russia has about 2,000 working tactical nuclear weapons while the United States has around 200 such weapons, half of which are at bases in Italy, Germany, Turkey, Belgium and the Netherlands. Amid the Ukraine crisis, Politico reported on Oct. 26 that the United States told a closed NATO meeting this month that it would a…