American forces have adopted Israeli military tactics employed in Gaza of dropping cautionary leaflets and knocker bombs intended to warn civilians of incoming attacks. The method was used outside of Mosul in a recent operation, yet a woman and a child were killed upon re-entering a building shortly after it was targeted by a hellfire missile. The deaths were disclosed by a Department of Defense official in a briefing yesterday on expanding U.S. forces in Iraq as it battles fighters with the Islamic State.