An even rarer find, and the oldest Porsche not sold in the U.S., was this blue 1950 356 Cabriolet owned by Richard Brumme of Annapolis, Md.

FORBES: In Photos: The Two Oldest Porsches in America

The MD of one consultancy told us how its intelligence-gathering dissuaded a blue-chip British company from a potentially damaging investment in a corrupt privatisation in a south-east Asian country.

BBC: I spy with my private eye.....

Koppel wore a light blue shirt, dark suit and tie before the bright lights at Discovery Headquarters in Silver Spring, Md.

NPR: Putting TV on the Radio