Islamic terrorists are stoking alarm with threats of an all-out cyber crusade against the United States, and experts say the warnings should be taken seriously.
Check it out:

Hackers claiming affiliation with the Islamic State in Iraq and Syria (ISIS) released a video Monday vowing an “electronic war” against the United States and Europe and claiming access to “American leadership” online.

“Praise to Allah, today we extend on the land and in the Internet,” a faceless, hooded figure said in Arabic. “We send this message to America and Europe: we are the hackers of the Islamic State and the electronic war has not yet begun.”