How did Russia’s Kh-101 missile get single-crystal blades exclusive to US engines?

The debris from Russia's Kh-101 missile indicates an unexpected twist: its advanced components include single-crystal blades, a technology typically exclusive to US aerospace engineering. This revelation raises questions about how Russia acquired such sophisticated materials, potentially hinting at unauthorized technology transfer or espionage. Such insights are critical for understanding the dynamics of military technology exchange and the extent of international tech collaborations or breaches. This discovery underscores the importance of maintaining stringent controls over advanced technologies to prevent strategic disadvantages.