The Washington Post has unveiled its comprehensive, alarming, and much-anticipated report on "Top Secret America." The dedicated site details the billions of dollars in private, for-profit intelligence operations that have emerged since Sept. 11, 2001, which the Post calls our "fourth branch" of government. Led by reporters William Arkin and Pulitzer Prize-winner Dana Priest, the investigation was two years in the making and shook up the vast U.S. intelligence community even before it was released. The "Top Secret America" website includes articles, videos, interactive features, and maps all begging to be explored. But here's the executive summary.