In a moment that reveals how deeply intertwined military security and global energy stability have become, Saudi Arabia's Crown Prince Mohammed bin Salman has turned to Washington for greater military partnership as Iranian-backed Houthi forces press a widened offensive from Yemen. The request is not merely one nation asking another for help — it is a signal that existing arrangements are straining under the weight of an adversary that has grown in both capability and ambition. At stake is not only the security of the Arabian Peninsula but the uninterrupted flow of energy that underpins econom