Biden and Putin shake hands
Following brief remarks from Swiss President Guy Parmelin wishing them well, Biden and Putin shook hands in front of cameras, with both men grinning, before entering the summit site.
Biden and Putin's meeting is expected to last four to five hours total with multiple sessions.
First, they're taking part in a small session, joined by U.S. Secretary of State Antony Blinken and Russian Foreign Minister Sergey Lavrov, ahead of a larger working session.
Biden and Putin are also expected to hold dueling, solo press conferences following the summit.