The suspension of U.S. military aid to Ukraine was a unilateral move by Defense Secretary Pete Hegseth, despite a military analysis that found the aid did not threaten U.S. combat readiness, NBC News reported, citing three unnamed congressional aides and a former U.S. official familiar with the matter. A senior Pentagon official, Elbridge Colby, the undersecretary of defense for policy, has backed the moves, the sources said. Colby has long advocated scaling back the U.S. commitment in Ukraine