There is a consensus view that the crisis in eastern Ukraine represents the most serious threat to Europe's security and stability since the fall of the Berlin Wall. Ukraine and Russia are just a few steps away from all-out war, but right now there are hopes of a ceasefire. So, is there a path back from the brink?

(Photo: Ukrainian President Petro Poroshenko (C) during the 2014 NATO Summit in Newport, Wales. Credit: AFP/Getty Images)