In a significant expansion of its campaign against Russian energy infrastructure, Ukraine’s security services executed a long-range drone strike on a major offshore oil field in the Caspian Sea, effectively halting production at a key Lukoil facility. The attack on Dec. 11 marks the first time Kyiv has targeted hydrocarbon extraction assets in the Caspian region, a development that signals a new phase in the targeting of Russia’s economic lifelines and raises questions regarding the security of energy corridors previously considered…