Stuxnet Virus

'The Interview' may be the first casualty in a serious, new kind of war

Two years ago, Defense Secretary Leon Panetta warned that the United States faced the threat of cyberattacks from technologically sophisticated foes who could one day unleash chaos and death via the Internet.

Derailing a train, contaminating water supplies, shutting down power grids: Beware the possibility of a “cyber-Pearl Harbor,” is how Panetta memorably put it.

Such disastrous scenarios make what happened this week — you won’t get to see a Seth Rogen/James Franco movie over the holidays — sound relatively harmless.

But if you think of this as a test run, it’s absolutely clear why this poses a threat to national security.

The FBI on Friday accused North Korea,...