President Biden has codified changes to the U.S. military's command structure in an update of the Pentagon's Unified Command Plan that includes a major shift: moving global missile defense operational support responsibilities from U.S. Strategic Command to U.S. Space Command. On April 25, the president signed the Unified Command Plan 2023, a Pentagon official told Inside Defense , referring to a document required by law to be updated every two years that establishes the missions and geographic responsibilities among the...