How Did Israeli Intelligence Miss Hamas’ Preparations to Attack?

Israeli intelligence is known for its sophistication, so how did Israel fail to piece together clues about this large-scale attack? In an article for The Conversation, Javed Ali, U-M professor and counterterrorism and intelligence scholar who has spent years working in U.S. intelligence explains how Israeli intelligence works and the potential gaps in the system that paved the way for the Hamas incursion.