For Israel_more so than for any other state_an effective Intelligence Community has been a matter of life and death. Over the past half-century or so, Israel has created and refined what is broadly regarded as one of the best intelligence networks in the world. It has repeatedly undone efforts by hostile Arab neighbors to defeat it in war, foiled countless terrorist attacks, contributed to military preparedness and armament production, and helped millions of Jews to reach the Promised Land. Unfortunately, it has also committed some terrible mistakes and made blunders it can ill afford.