What You Don’t Know About Cyberwar Could Kill You, ‘Zero Days’ Warns

Zero Days may be the most important movie you will see all year. It helps you understand something you thought you could never understand: cyberwar.

I have studied nuclear, biological, and chemical weapons for 35 years. So, I figured I knew a good deal about the threats of mass destruction. I was wrong.

I have been largely ignoring the new cyber weapons that many talk about but few really get. After seeing Alex Gibney’s new thriller, Zero Days, which opens July 8, I now believe these pose a greater threat to America than any other weapon save nuclear. Like nuclear weapons, the United States created them and used them first. Like nuclear, they have proliferated. (Disclaimer: Zero Days is produced by Participant Media, TakePart’s parent company.)

Cyber weapons—commonly known as viruses—are computer programs that spread through the internet or by infected disks or thumb drives that can take over a computer’s functions. By now, almost everyone with a computer has experienced some version of this malicious software.

But if you thought the threat was limited to stealing your credit card or wiping out your company’s files, you too are wrong. In 2010, computer viruses took a deadly leap. They went from software (or code) that affected other software to code that could take over hardware. A virus could take over not just your computer; it could take over your factory. Or your electric power grid. Or your nuclear missile silos. Here’s the worst part: The group that made this leap wasn’t the Islamic State or North Korea or a James Bond criminal syndicate. It was us.

Watch the trailer:

The United States worked with Israel to develop the Stuxnet virus in order to take over Iran’s centrifuges—the machines used to enrich uranium. The classified story, first revealed by David Sanger in The New York Times and grippingly told in this new film, is horrifying. It is, as Sanger says, “the first, the biggest, and most sophisticated example of a state or two states using a cyber weapon for offensive purposes.”

Stuxnet worked. It destroyed more than 1,000 of Iran’s centrifuges by manipulating their operations until they broke apart. But it also failed. The Iranians recovered and built many more centrifuges. They were racing toward the ability to quickly make the material needed for a nuclear bomb.

Where cyberwar, sanctions, and military threats failed, diplomacy succeeded. On July 14 of last year, negotiations led by the United States culminated in an agreement that stopped the Iranian program and convinced the Iranians to rip out more than 15,000 of their machines. The New York Times editorialized:

“The final deal with Iran announced by the United States and other major world powers does what no amount of political posturing and vague threats of military action had managed to do before. It...is potentially one of the most consequential accords in recent diplomatic history.”

But it came too late to prevent the dangerous new arms race Stuxnet unleashed. The cyber leap, once taken, cannot be undone. Other nations have followed our lead. There have been scores of nation-state attacks on other systems since Stuxnet, including two by Iran directed against Saudi Aramco and American banks that, according to the Symantec experts in Zero Days, were an explicit warning to us: We can do it too.

Former CIA Director Michael Hayden tells Gibney that when he learned of the attack, he thought, “This has a whiff of August 1945. Somebody just used a new weapon, and this weapon will not be put back in the box.”

Cyber weapons can replace suicide bombs. They can take over a rail system, switch tracks, and crash trains. They can close valves on a gas pipeline and cause an explosion. Basically, they can sabotage anything run by electronic controls. “Imagine for a moment that not only all the power went off on the East Coast,” one expert explains in the film, “but that the entire internet came down. Imagine what the economic impact of that is, even if it only lasted for 24 hours.”

It gets worse. Government whistle-blowers tell of another program we perfected, Nitro Zeus, designed to attack Iran’s command and control system. In the event of war, we could shut down their ability to talk to each other or to shoot down our planes. “We also went after their civilian support systems,” one source revealed. “Power grids, transportation, communication, financial systems. We were inside waiting, watching, ready to destroy those systems with cyber attacks.”

What if someone did that to us? What if someone infiltrated our nuclear command and control so that if we pushed the button, nothing happened? Or if something happened even without our pushing the button? What if Pakistan did this to India, or India to Pakistan?

If this is beginning to terrify you, you are getting the point. We all must learn more. Maybe we will all agree that we must expand our new Cyber Command, the military command set up to wage cyberwar. Or maybe we will agree with national security expert Richard Clark that we can rein in this threat with new arms-control agreements.

But we can’t have that debate if we don’t know what our own government is doing. That is why it is so important to break down the wall of secrecy that shields our programs from oversight. That is why seeing Zero Days may be your first step to understanding the dangers created by these new weapons.

Zero Days will be in theaters and available on Demand and on iTunes and Amazon Video July 8.

A version of this article previously appeared on The Huffington Post.