Russia's deadly air strikes on Ukraine's cities this week have triggered calls for more military aid, but analysts warn than no air-defence systems can completely defend Ukrainian territory.
Condemned to Lead Europe, German Chancellor Struggles for Impact nytimes.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from nytimes.com Daily Mail and Mail on Sunday newspapers.
The comments by Russia's foreign minister that the Kremlin's territorial ambitions in Ukraine now go beyond the Donbas set off alarm bells in Western capitals. In fact, it may be just a rhetorical ploy, and simply more improvisation in a war that hasn't gone according to plan.