Basically the feeling is that the Ukraine military, even if they were armed by the West, are not competent enough to successfully drive back the Russian forces in their country, therefore the "Kosovo Solution", ie air strikes on Russian forces, are being talked about by Germany, Britain and the US. To those that don't believe there are Russian forces fighting in Ukraine, read this: Diplomatic obfuscation aside, 10 reasons why the ceasefire in Ukraine is a myth Also, Putin has now admitted that he sought to have Crimea returned right after the previous Ukrainian President fled: Putin Says He Decided To Take Crimea Just Hours After Yanukovych's Ouster