Exxon Mobil Corp. leader Rex Tillerson is visiting Moscow this week for meetings with Russian oil producer OAO Rosneft and government officials amid talk of further sanctions, according to people familiar with the matter. The chief executive officer, who increased Exxon’s drilling rights in Russia fivefold last year, has preliminary plans to meet with officials on Wednesday, said two of the people who asked not to be identified because details of the visit are confidential. Exxon declined to comment, saying the travel plans of its executives aren’t public. The trip comes even as the U.S. and Europe consider further sanctions on Russian companies and individuals over the annexation of Crimea one year ago. Exxon snapped up millions of acres in Russia last year, […]