Sinwar in a tunnel in Gaza, October 6, shortly before midnight. An officer later testified that the day had been so quiet "that I wondered what to write in the daily report."

Sinwar in a tunnel in Gaza, October 6, shortly before midnight. An officer later testified that the day had been so quiet “that I wondered what to write in the daily report.” Credit: Photo illustration: Masha Zur-Glozman

So how the hell did it happen? In his new book, Haaretz’s military analyst reconstructs the horrifying lead-up to the Hamas massacre, and the signals that were misinterpreted and ignored