The leak of high-classified U.S. intelligence documents to the Iranian regime last week has triggered a much-needed counter-intelligence investigation to identify the source -- either a mole who has betrayed their country, or a cyber-hack. The documents, which bore Top Secret/NOFORN and compartmented intelligence headers, described U.S. satellite spying on Israeli airfields as the IDF conducted exercises believed to foreshadow a massive airstrike on Iran. The NOFORN designation means that the document cannot be shared with foreign nationals other than members of the "Five Eyes" intelligence-sharing arrangement the United States has crafted with the United Kingdom, Canada, New Zealand, and...