The sound of air raid sirens blared and fighter jets screamed overhead. These were the sounds that accompanied my phone call with my wife Randi on Monday as I rode Jerusalem’s all-but-empty light rail. With an edge of panic in her voice, she asked me what she should do. I calmly instructed her to follow the Home Front Command orders for civilians. We had repeatedly reviewed them since Saturday to the point that I had downloaded the app to my cellphone.