Kooker reports on an interesting story - this past Friday a newly married young man, in the middle of his week of sheva brachos, went to Rav Chaim Kanievsky and asked an important question. His mother, living in Ashdod, is making the sheva brachos on Shabbos. They wanted to know if they should not go because of the danger. On the other hand, not going would hurt his mother. What should they do?

Rav Chaim Kanievsky refused to answer them but instead sent them to ask Rav Shteinman.

Rav Shteinman heard the question and told them they should go to Ashdod for the sheva brachos, and they should make sure to take all safety measures and follow the instructions of Pikud Haoref - the Home Front Command.

and, more on Bnei Braq and the promise of the Chazon Ish -

Kooker adds that Rav Nissim Karelitz was asked by one his grandchildren this week regarding the famous promise of the Chazon Ish. Rav Nissim Kaarelizt is the nephew of the Chazon Ish. The grandchild asked what to do if the siren blares in Bnei Braq. Rav Karelitz told him to go into the secure room, the bomb shelter.

What about the promise of the Chazon Ish?

Rav Nissim Karelitz answered that it is true, the Chazon Ish did make the famous promise that missiles wont fall in Bnei Braq, and he heard it from the Chazon Ish with his own ears. However, he said, despite the promise, the obligation of hishtadlus one must take all precautions and follow safety instructions.