Why the long faces, guys?
For starters, Ukraine.
Secretary of State John Kerry is meeting with Russian Foreign Minister Sergey Lavrov in London to discuss possible ways to resolve Russia's aggressive posture towards the Ukrainian region of Crimea - and potentially more of the nation's mainland.
"A lot of time has been lost, so now we have to think what can be done," Lavrov said in remarks with Kerry before they sat down with their respective teams.
If this photo, taken before the meeting started is any indication, it's going to be a long day for both diplomats. Hope they have enough tea.