Russian President Vladimir Putin has arrived in Delhi for his two-day visit to India. Both India and Russia are expected to ink a Five Billion Dollar S-400 Missile Deal at the 19th India-Russia Annual Bilateral Summit that begins in New Delhi Today. Defence Minister Nirmala Sitharaman has reiterated that the S-400 Air Defence Missile Deal will go ahead notwithstanding the US sanctions on military transactions with Moscow. If the deal does go ahead, India will invite the possibility of sanctions from the united states. Besides the missile deal, Putin and PM Modi will discuss the issue of security challenges in the Afpak region and the threat of terrorism that emanates from Pakistan. India had earlier voiced its concerns over defence cooperation between Moscow and Islamabad and questioned why there is a need to have such cooperation.