A top NASA leader brought in to lead the 2024 Moon Mission "Artemis" strategy has withdrawn after Congress, failed to support the initiative, reports from Reuters. Mark Sirangelo, who served as Special Assistant to NASA's Chief Jim Bridenstine, left after just six weeks at work. Sirangelo "has chosen to pursue other opportunities," Bridenstine said in a statement on Thursday. His resignation came after a NASA proposal for a reorganization within the agency to create a new directorate focusing on a "sustainable moon campaign" was rejected by Congress. Sources quoted by Reuters said Sirangelo was escorted out of NASA's Washington headquarters after his resignation.