At 6:30 a.m. on Oct. 7, the piercing sound of sirens woke up Naama Weinberg in her Tel Aviv apartment. Itay Raviv, left, and siblings Naama and Ofir Weinberg show necklaces inscribed with the phrase in Hebrew, “Our heart is captive in Gaza,” and, in English: “Bring them home now!” “We are very worried that the damage could be irreversible,” …