Well, maybe they are trying to keep the sharks away and ruining the fun of people at the shore? Seriously, I suspect they are “testing the water,” in a manner of speaking. Obama is in the WH. It is apparent that he is weak on protecting the US. Perhaps they want to see just how far they can push him.
Well Obama tipped the Russians off that we could spot and follow their subs. Maybe the Russians were testing to see if he was stupid enough to show his hand... he passed.