Athletes are no strangers to controversy, posing dilemmas for corporate sponsors. Pistorius is the latest challenge for Nike, whose problem children have included Lance Armstrong, Tiger Woods and NFL quarterback Michael Vick.

The Financial Times has a cool Olympic feature, where they run a formula for how many medals countries should get -- based on things like historical performance, per capita GDP, and host-country advantage. Then they compare that against actual performance in the Games.

The U.S. military is experimenting with new ways to gather data to help personnel in short-term and long-term.

Endorsements aren’t the only financial payoff for successful Olympic athletes. There’s a well-worn path from the podium to Wall Street jobs.