FrontlineTonight PBS's Frontline has an investigation of "black money," bribes made by international conglomerates to land contracts.

We worked on two related stories with Frontline. Last September, we looked at the bribes doled out by a former Halliburton subsidiary. And in December, we explored how Siemens, one of world's biggest companies, ended up paying $1.6 billion in fines for bribery, the largest in modern corporate history. Reporting from those pieces made it into the Frontline segment.