To the wire - A war waging on two fronts

In what promises to be the ultimate test of America’s resolve to face down the threat posed by Russian president Vladimir Putin, Obama arrives in Estonia. For now, that’s as close as they get to eye-balling one another. The burning question is who will blink first?
From the relative safety of a summit in Wales, the Nato alliance can be expected to rattle its sabres in the most crucial meeting of the alliance since the Cold War. Otherwise, it is hard to see what cash-strapped Nato can do. While Obama talks of diplomacy, Putin defiantly flouts every law in the book, invading Ukraine and arming rebel fighters.