A disturbing intelligence picture is emerging from inside Iran, and it should worry anyone still hoping this war stays contained. Regional officials have reportedly said they're picking up signs of a strategic shift inside Tehran, one that doesn't de-escalate this conflict; it widens it. And the fallout won't stop at Iran's borders. Is Tehran quietly preparing for its next move, and is this war about to enter a far more dangerous phase? This NDTV World explainer delves deep.