In the urgent aftermath of Sept. 11, 2001, with more attacks thought to be imminent, analysts wanted to use 'contact chaining' techniques to build what the NSA describes as network graphs of people who represented potential threats.

Enclosed by a sand berm four miles around and 160 feet high, the Baghdad Nuclear Research Facility entombs what remains of reactors bombed by Israel in 1981 and the United States in 1991. It has stored industrial and medical wastes, along with spent reactor fuel.

The first time I set out to find George F. Kennan, in 1982, I had just turned 21, begun my final semester at Princeton University and noticed with astonishment that the senior thesis deadline had crept to within four months.

Barton Gellman Quotes