Concerned about my friend in Israel I asked if she had a shelter room. Read her response.
"Yes we do. However, the problem is that you cannot lock them from the inside. They were designed to protect people from rockets. The only way to keep the terrorists from opening the reinforced steel door is to use all your strength to hold the handle so the terrorists can't turn it and open the door. I guess now someone will come up with a way to lock them. You see the picture. To open, you move the handle up and to the right. So you need to prevent that by using all your strength to keep someone from doing that. An extended family member did that for the 2.5 HOURS that terrorists were in their house and saved his family. Soldiers killed the terrorists."