Japanese Prime Minister Shinzo Abe (R) and visiting Iranian President Hassan Rouhani shake hands before their talks in Tokyo, Japan, Dec. 20, 2019. Rouhani, on a two-day trip to Japan marking the first for an Iranian president since 2000, heard from Abe about his concerns about rising tension in the Middle East at the outset of the meeting. (Charly Triballeau/AFP/Pool via Xinhua)