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Russian President Vladimir Putin hands U.S. President Donald Trump (L) a World Cup football during a joint press conference after their summit on July 16, 2018 in Helsinki, Finland.
Russian President Vladimir Putin's summit with US President Donald Trump in Helsinki, Finland on Monday ignited a firestorm of controversy in the US.
For the most part, the two world leaders were more friendly toward one another than Trump's predecessors were. Putin met the last four US presidents since he took office in the 1990s.
Here's what happened the other times Putin met with American presidents: