Russia, US open window of opportunity but need to speed up work -- Moscow's ambassador / Russia's ambassador to Dushanbe states huge prospects for Russian business in Tajikistan / Illegitimate UN envoy in BiH epitomizes Western neocolonialism -- Russian ambassador / Russia, Pakistan have close approaches to pressing int'l problems -- Russian ambassador / Armenian Foreign Ministry summons Russian ambassador over remarks in TV newscasts / Russia, Argentina interacting at working level -- Russian Ambassador / Russia, Kyrgyzstan do 90% of trade in rubles -- Russian ambassador / Indonesia is strong candidate for interaction with BRICS -- Russian Ambassador / Russian ambassador, head of UN mission to Golan Heights discuss situation in region / US goal of inflicting strategic defeat on Russia unrealistic -- Russian ambassador