<h1>National Security Advisor Discusses Energy, Defense Cooperation Amid Sanctions and Upcoming Summit</h1> A national security advisor from one country visited Russia to discuss bilateral energy and defense cooperation and to prepare for an upcoming presidential visit. The visit occurred amid tensions with a third country, which imposed additional tariffs on the advisor's country due to its continued purchase of Russian crude oil despite Western sanctions. The advisor's country justified its energy procurement based on national interest and market factors. Key discussion points included the impact of Western sanctions on Russian oil, energy ties, and the delivery of advanced air defense systems under a multi-billion-dollar contract signed in 2018. The visit also aimed to facilitate the planned summit between the two countries' leaders later in the year.