Vladimir Putin, Russia's president, left, speaks as Hassan Rouhani, Iran's president, listens during a news conference at the Gas Exporting Countries Forum (GECF) summit in Tehran, Iran, on Monday, Nov. 23, 2015. The talks between Putin, on his first visit to Iran since 2007, and Iran's Supreme Leader Ayatollah Ali Khamenei focused on the situation in Syria, where both Russia and Iran back Syrian President Bashar al-Assad, as well as the wider region. Photographer: Simon Dawson/Bloomberg via Getty Images
