Aerospace & Defense Roundup: Jan. 12
January 13, 2021General Motors debuts Cadillac VTOL concept, Rolls-Royce to study nuclear power options for space exploration, hypersonic OpFires enters manufacturing testing phase, auditors warn that UK's defense equipment plans are still unaffordable and more. A roundup of aerospace, space and defense news powered by Aviation Week Intelligence Network (AWIN). AWIN members can log in to view the full-length articles.