For decades, the transatlantic alliance has been the bedrock of western security. But the Iran conflict appears to have exposed fresh cracks in that relationship. The Pentagon estimates the United States has spent nearly $29 billion on the Iran war so far. But independent analysts say the real cost is far higher. The war in Ukraine has entered another grim milestone. The conflict has now lasted longer than the first world war, underscoring how a war that many expected to end in weeks has evolved into one of the longest and deadliest conflicts in modern European history. NDTV World's Gaurie Dwivedi brings the latest edition of Faultlines.