Danish UC submarines were built by the entrepreneur who is CEO of what company?
Peter Madsen (inventor) Peter Langkjær Madsen (] ; born 12 January 1971) is a Danish aerospace engineering enthusiast, "art engineer", submarine builder, entrepreneur, co-founder of the non-profit organization Copenhagen Suborbitals, and founder and CEO of RML Spacelab ApS.
Torstein Hagen Torstein Hagen (born 1943) is a Norwegian billionaire businessman, and the founder, chairman and chief executive officer (CEO) of Viking Cruises (originally Viking River Cruises).