US President Donald Trump's summit with Russian counterpart Vladimir Putin on Friday is a blockbuster moment in world politics that calls to mind several memorable previous meetings.
These events have tended to deliver major news headlines, as well as some glimpses into the intriguing, unpredictable and much-scrutinised personal relationship between the two leaders.
Looking back at the images also gives clues as to how they might approach Friday's head-to-head in Alaska, during which they will discuss ending the war in Ukraine.
The two bring very different approaches to private meetings, according to former officials who have dealt with either or both leaders behind closed doors.
Their first meeting came in July 2017, at a G20 summit in Germany. It was just months after Trump entered the White House, while Putin already had decades of political experience under his belt.
