Pentagon declassifies intel on alleged Moscow plan to film faked assault with Ukrainian and Turkish arms as border tensions continue to build

Over 100,000 troops are now stationed near Ukraine's borders, raising concerns Moscow may invade again; Ukrainian President Zelensky hosts Turkish counterpart Erdogan for talks

US president says small number of troops to bolster the NATO presence in region as tensions remain high

As Russian troops amass on the Ukrainian border, Joseph Weisberg, author of 'Russia Upside Down,' argues that a little empathy - and eased sanctions - could go a long way

Russian foreign minister says US sanctions would amount to complete severing of ties; comments come after Biden warns Kyiv of 'distinct possibility' Moscow could invade

White House looks to undercut Putin's plans by exposing them in a so-called 'prebuttal' that works better than an after-the-fact explanation

Foreign Minister Lavrov says top officials will advise Putin on next steps when it gets US response to demands, but West still concerned Moscow planning to invade

Biden says he may impose sanctions on Putin personally if Russia invades; other measures could restrict shipments of high-tech US equipment

President Zelensky insists situation under control; Defense Minister Reznikov admits 'risk' but notes massed Russian troops on border are not forming battle groups

As tensions between Moscow, Kyiv and West ratchet up, some see echoes of region's complicated history, while others warn against drawing too many parallels with past