New Delhi: Delivery of Russia's S-400 Triumf air defense systems to India has begun, under a $ 5.2-billion deal signed by the Narendra Modi government. Some parts of the system have already arrived in the country, ThePrint has learned. However, the submission poses a threat that the US imposes sanctions under the Counting America's Adversaries Through Sanctions Act (CAATSA), which was passed in 2017 to take action against countries involved in trade with Moscow.Dmitry Shugaev, director of the Russian Federal Service for Military-Technical Cooperation (FSMTC), told Sputnik state media: "The roll-out of the S-400 air defense system to India has begun and is still ongoing." The development comes ahead of a proposed visit by Russian President Vladimir Putin to India in December.Sources at the defense center said the phased deployment of the first S-400 system, of the five ordered by India, has begun, and hardware has already arrived in India. He added that the full pro...