Pentagon leaders are working to clarify lanes of responsibility for the defense of Guam, an unusually complex project -- even for the Defense Department -- that involves many intertwined organizational, functional and technological dimensions in a high-stakes, quick-moving project deemed crucial to defending, if necessary, Taiwan from China beginning in 2024. Deputy Defense Secretary Kathleen Hicks designated the Army secretary as the overall lead for the defense of the westernmost U.S. territory while also tapping the under secretary of defense...