Kiva is an organization that matches lenders, mainly in rich countries, with microfinance organizations and entrepreneurs and students mainly in poor countries. Several of its organizers have posted a wonderful representation of the flow of money -- outgoing from lenders to recipients, and back again when the loan is repaid.

Intercontinental Ballistic Microfinance from Kiva Microfunds on Vimeo.

This is absorbing enough in its own right (especially after the first 40 seconds or so) -- but all the more so if you have ever seen war-game counterparts involving a different sort of intercontinental ballistic device. Worth watching and learning more about. (Thanks to S.N.)