But as a dossier of evidence on nuclear black markets published this week by the London-based International Institute for Strategic Studies points out, Mr Khan's business model wasn't unique.

ECONOMIST: The nuclear black market

Born in the eastern Indian state of Orissa, Mr. Jain got an undergraduate degree in engineering at the Indian Institute of Technology in Kharagpur in 1972 and worked as both an engineer and salesman for International Business Machines Corp.

WSJ: In Ajit Jain's Successes, Some See Buffett Successor