Thirteen-year-old Mona still remembers the moment the second airstrike hit. "We were sitting on the sixth floor when they struck the seventh - my uncle's apartment," she said. "My uncle's wife was screaming, 'My children! My children are gone!' As I rushed to help her, they fired the second shell. That's when my mother and my siblings were killed." Mona survived the attack in Gaza, but her mother,...