Timeline: Russia's Worrying Stand-Off With Ukraine

On Monday France says that Putin and Biden have agreed to a summit. But the Kremlin says it is too early to discuss organising a summit.

Russia's massing of troops along the border with Ukraine has put Washington and Moscow into an increasingly tense Cold War-style stand-off.

Here is a timeline of the situation.

Troop movements

On November 10, Washington reports unusual Russian troop movements near the Ukrainian border.