The cross-border sharing of intelligence is fundamental to the establishment and preservation of security and stability. The American invasion of Iraq in 2003 was based in part on flawed intelligence, and current efforts to defeat al Qaeda would not be possible without an exchange of information among Britain, Pakistan, Indonesia, and the United States. While critical to national security and political campaigns, intelligence sharing can also be a minefield of manipulation and maneuvering, especially when secrecy makes independent verification of sources impossible.

In The...