Victims ' families are disappointed that Anders Behring Breivik is ruled insane . Breivik will still face trial July . He is accused of killing 700 people in a gun and bomb rampage . `` In the United States , it is extremely difficult to establish successfully an insanity defense , '' he told CNN in a telephone interview . The next year massacre was the deadliest attack in the United States since World War II .
Victims ' families are disappointed that Anders Behring Breivik is ruled insane . Breivik will still face trial July . He is accused of killing 700 people in a gun and bomb rampage . The next year massacre was the deadliest attack in the United States since World War II .