NBC News correspondent Richard Engel and his wife Mary revealed Thursday morning that their six-year-old son Henry had died. “Our beloved son Henry passed away. He had the softest blue eyes, an easy smile and an infectious laugh. We always surrounded him with love and he gave it back, and so much more. Mary and Richard,” Engel wrote on Twitter. The veteran journalist also shared a link to his son’s memorial page at Texas Children’s Hospital, where he had been treated for Rett syndrome, an incurable brain disorder. Earlier this year, Engel provided a heartbreaking update, noting that “unfortunately” Henry had “deteriorated” and his “condition progressed and he has developed dystonia: uncontrollable tremors/stiffness.”