As the day wore on, the emergency alerts blared repeatedly and, each time, the residents of Tel Aviv calmly walked to their shelters, without panic, often chatting with friends. The rhythm was structured and predictable: a pre-alert, giving everyone five or so minutes to find a safe place, and then a follow up indicating that there was 90 seconds to get inside. With bomb shelters being ubiquitous and borderline impregnable, all one needs to do is follow instructions.