2) While not confirmed, possible Hamza killed in Afghanistan: a July-Aug 2017 letter he wrote (surfacing in Dec 2017) announced death of his 12-year-old son Usamah (believed to be Afghanistan). Hamza described his activities, implying he was with him. https://t.co/6wKo5B76kN pic.twitter.com/LFtFoYNuKN

— Rita Katz (@Rita_Katz) July 31, 2019