Two more were arriving soon, hospital officials told a news conference. &quot;It&#039;s a terrible tragedy. We know that. We know there are casualties, both people killed and injured,&quot; Defense Secretary Chuck Hagel told a news conference in Honolulu, where he was meeting with Asian defense ministers.&lt;br /&gt;U.S. Secretary of Defense Chuck Hagel speaks about the shooting at Fort Hood during a news conference. (AP)