Turkish President Recep Tayyip Erdogan (L) shakes hands with Russian President Vladimir Putin (R) during a joint news conference following their talks on the sidelines of the MAKS 2019 International Aviation and Space Salon in Zhukovsky, outside Moscow on August 27, 2019. - Russian President Vladimir Putin and Turkish leader Recep Tayyip Erdogan met for talks in Moscow on August 27 as they seek common ground on the deadly fighting in northwestern Syria. The meeting came ahead of a September 16 summit in Ankara that will bring together the main foreign players in Syria's conflict -- Putin, Erdogan and Iran's President Hassan Rouhani. (Photo by Maxim SHIPENKOV / POOL / AFP) (Photo credit should read MAXIM SHIPENKOV/AFP/Getty Images)