More than a dozen children with cancer or other serious blood disorders have been safely evacuated from Gaza after weeks of difficult negotiations involving the U.S., Egypt, Israel and Hamas — but more than 30 remain in the war-torn territory, three doctors involved in the effort tell NBC News. The children, accompanied by parents or companions, were evacuated from the Al-Rantisi Specialized Hospital for Children to hospitals in Egypt and Jordan, the St. Jude Children’s Research Hospital and the World Health Organization said Friday. The development comes as hospitals across northern Gaza on Thursday and Friday came under munitions fire...