Good insight from Stratfor on how three seemingly unrelated events intersect:
Germany needs a deal with Russia to be able to manage an existential crisis for the eurozone; Russia needs a deal with the United States to limit U.S. encroachment on its sphere of influence; and the United States needs a deal with Iran to refocus its attention on Russia. No conflict is divorced from the other, though each may be of a different scale. Germany and Russia can find ways to settle their differences, as can Iran and the United States. But a prolonged eurozone crisis cannot be avoided, nor can a deep Russian mistrust of U.S. intentions for its periphery.
Both issues bring the United States back to Eurasia. A distracted Germany will compel the United States to go beyond NATO boundaries to encircle Russia. Rest assured, Russia — even under severe economic stress — will find the means to respond.