In Israel these days, unless your apartment has a blast-resistant room, it’s best to go to bed in something that you’re comfortable wearing in a bomb shelter. Your phone is likely to wake you with the clatter of an alert for incoming missiles: First comes a text message that says to be near a protected area. Several minutes later, a second screech brings a message to take cover. The government has approved the reopening of workplaces that have shelters, but most children are home, attending