美媒：美国防部阻止乌克兰使用远程导弹打击俄境内目标

Core Viewpoint - The U.S. Department of Defense has been preventing Ukraine from using long-range missiles to strike targets within Russia for several months, indicating a controlled approach to military support for Ukraine [1] Group 1: U.S. Defense Department's Policy - Since late spring, a high-level approval process established by the U.S. Department of Defense has blocked Ukraine's attempts to use American-made Army Tactical Missile Systems (ATACMS) against targets in Russia [1] - The approval process is overseen by Deputy Secretary of Defense Ely Ratner, with Secretary of Defense Lloyd Austin holding the final decision-making authority [1] - The review process not only applies to U.S. long-range missiles but also includes European weapons that rely on U.S. intelligence and components [1] Group 2: Political Context - Former President Trump stated that Ukraine cannot defeat Russia unless it can launch attacks against it, which some media interpret as encouragement for Ukraine to strike Russia [1] - However, U.S. officials clarified that Trump's comments do not signify a change in U.S. policy regarding military support for Ukraine [1]