The department said that on August 14, 2015, Hamza bin Laden was officially announced by al Qaeda senior leader Ayman al-Zawahiri as a member of the terror organization. That same year, in an audio message released by al-Zawahiri, Hamza bin Laden called for "lone offender attacks against US, French, and Israeli interests in Washington, D.C.; Paris, France; and Tel Aviv, Israel."