Putting Ukraine in an untenable position - The Washington PostUkrainian President Petro Poroshenko in February. (Valentyn Ogirenko/Reuters) NEARLY SIX months after Russia agreed to an immediate cease-fire in eastern Ukraine, its forces continue to shell and rocket Ukrainian positions on a daily basis. Far from pulling back heavy weapons or withdrawing its troops as required by the agreement, it has built military bases and deployed 9,000 troops inside Ukrain
