­In October 2005, U.S. congressman Tom DeLay was indicted on money laundering charges, forcing him to step down as House Majority Leader. Money laundering is a serious charge -- in 2001, U.S. prosecutors obtained almost 900 money-laundering convictions with an average prison sentence of six years. The rise of global financial markets makes money laundering easier than ever -- countries with bank-secrecy laws are directly connected to countries with bank-reporting laws, making it possible to anonymously deposit "dirty" money in ­one country and then have it transferred to any other country for use. ­

­Money lau­ndering happens in almost every country in the world, and a single scheme typically involves transferring money through several countries in order to obscure its origins. In this article, we'll learn exactly what money laundering is and why it's necessary, who launders money and how they do it and what steps the authorities are taking to try to foil money-laundering operations.

Money laundering, at its simplest, is the act of making money that comes from Source A look like it comes from Source B. In practice, criminals are trying to disguise the origins of money obtained through illegal activities so it looks like it was obtained from legal sources. Otherwise, they can't use the money because it would connect them to the criminal activity, and law-enforcement officials would seize it.