Putin proposes supersonic civilian aircraft based on its Tu-160 bomber

The business case for supersonic transports is rather tenuous. But an SST made from a relatively ancient military aircraft? Errrmmm… no. Can such an aircraft work? Sure, you betcha. Can such an aircraft work economically? Very unlikely. Now, this is Putin; his SST could very well be aimed to not be a truly affordable aircraft, but a prestige project to be paid for by flying his oligarch buddies hither and yon.