Although not the main event, a sideline meeting between Russian Foreign Minister Sergei Lavrov and US Secretary of State John Kerry in Basil later on Dec. 4 is being viewed as crucial with relations strained over the Ukraine crisis.
Russia's War Against Ukraine
Euronews: OSCE meeting in Basel brings Kerry and Lavrov face to face over Ukraine (VIDEO)
US Secretary of State John Kerry (R) and Russian Foreign Minister Sergei Lavrov shake hands in Beijing on Nov. 8, 2014.