Dictators, oligarchs, drug traffickers, crooks, and others with ill-gotten fortunes can hide their money from public scrutiny, creditors, and from the law — while at the same time avoid paying taxes. How? By stashing the wealth in opaque, complicated financial instruments in other countries. It's called offshoring. We talk with 'Washington Post' reporter Greg Miller about what the some 12 million documents of the Pandora Papers tell us about these hidden assets.