NSA's data collection doesn't apply to US Citizens -- until it does.

The NSA (National Security Agency) is harvesting hundreds of millions of contact lists from personal e-mail and instant messaging accounts around the world, many of them belonging to Americans, as reported in an article in the Washington Post yesterday. 

From the article: Although the collection takes place overseas, two senior U.S. intelligence officials acknowledged that it sweeps in the contacts of many Americans. They declined to offer an estimate but did not dispute that the number is likely to be in the millions or tens of millions.