“Al Qaeda’s propaganda arm, As Sahab, has released a new message from Osama bin Laden’s son, Hamzah. It is the second time Hamzah has spoken on behalf of al Qaeda since last August. Hamzah’s message has been paired with a speech by Ayman al Zawahiri on both occasions.”
Source: Osama bin Laden’s son says jihad in Syria key to ‘liberate Palestine’ | The Long War Journal