Is a rational al-Qaida merely biding its time?

Gossip, speculation, and scuttlebutt about politics.
March 5 2009 4:37 PM

The Time-Space Theory

Is a rational al-Qaida merely biding its time?

(Continued from Page 1)

Berrebi and Lakdawalla's "How Does Terrorism Risk Vary Across Space and Time?" focuses on Israel's experience, but it can be applied to the question of why al-Qaida hasn't attacked the United States since 9/11. The "space" referred to in the title is the particular site chosen for a terrorist attack. Proximity to the terrorist headquarters and easy access to an international border are, Berrebi and Lakdawalla write, hugely important in deciding whether to carry out a terrorist attack. "When distance to a terrorist home base doubles," they calculate, "the frequency of attacks falls by around 30 percent." Areas near international borders "are more than twice as likely to be hit" as areas far from international borders. Following this logic, Israel is a veritable paradise for Islamist terrorists. It's located right in the Middle East, and, east to west, it's only 85 miles wide. The United States, by contrast, is a jihadi's worst nightmare: halfway across the world and 3,000 miles wide. The two countries' comparative experience with terrorism reflects these realities.

The "time" referred to in the title is the interval between attacks, and it's a lot less comforting to people who live in the United States. To simplify things as we spoke in a RAND conference room, Berrebi drew a rudimentary graph on a whiteboard. The vertical axis represented the risk of attack in a regional capital. The horizontal axis represented the passage of time. It looked like this:

1_123125_123102_2208091_2211070_2211993_090305_chb_graph

The risk of attack increases sharply before an attack occurs (duh), then falls, then levels off and eventually starts to rise again. I mentioned to Berrebi and Lakdawalla that my girlfriend had travelled to New Delhi a couple of weeks after the Mumbai terror attack and that I'd worried about her. Guess I shouldn't have worried! Berrebi shook his head and tapped on the line just to the right of the first peak. The risk immediately after an attack, he said, is still very high, because it takes the authorities some time to figure out what's happening and to beef up security—and because the terrorists' planned mission may not be completed. Gradually, security measures are put in place. Then gradually, these security measures slacken, creating new opportunities for attack. In Jerusalem, Berrebi and Lakdawalla found that after a terror attack the risk of a follow-up attack begins to increase after only two incident-free months. "This suggests," they conclude, "that long periods of quiet actually indicate elevated risk for sensitive areas." Berrebi and Lakdawalla are restating the familiar war-movie cliché in which two soldiers stand guard over a peaceful nighttime landscape. "It's quiet," says one. "Yeah," says the other. "Too quiet." Then the enemy emits a battle cry and the fighting begins.

Advertisement

In Jerusalem, it's two months from peak to trough. In the United States, it's X months, where X has an unknown value greater than 44. * If the United States suffers another major terror attack, Berrebi and Lakdawalla will be able to calculate the value of X. They think they'll probably get that second data point. They just don't know when.

Co rrection, March 6, 2009: An earlier version of this column erroneously set the value of X at greater than 89 months, which denotes the period from peak to peak. Measuring from peak to trough, it's approximately half that, i.e., greater than 44 months. (Return to the corrected sentence.)

TODAY IN SLATE

Politics

Meet the New Bosses

How the Republicans would run the Senate.

It Is Very, Very Stupid to Compare Hope Solo to Ray Rice

The U.S. Is So, So Far Behind Europe on Clean Energy

Even if You Don’t Like Batman, You Might Like Gotham

Friends Was the Last Purely Pleasurable Sitcom

The Eye

This Whimsical Driverless Car Imagines Transportation in 2059

Medical Examiner

Did America Get Fat by Drinking Diet Soda?  

A high-profile study points the finger at artificial sweeteners.

A Woman Who Escaped the Extreme Babymaking Christian Fundamentalism of Quiverfull

Nicolas Sarkozy, Thrice Married, Says Gay Marriage Humiliates the Family

  News & Politics
Over There
Sept. 22 2014 1:29 PM “That’s Called Jim Crow” Philip Gourevitch on America’s hypocritical interventions in Africa.
  Business
Moneybox
Sept. 22 2014 1:37 PM Subprime Loans Are Back! And believe it or not, that’s a good thing.
  Life
Dear Prudence
Sept. 22 2014 3:33 PM Killing With Kindness My in-laws want to throw me a get-well-from-cancer bash. There’s no way I can go.
  Double X
Doublex
Sept. 22 2014 4:06 PM No, Women’s Soccer Does Not Have a Domestic Violence Problem Or, why it is very, very stupid to compare Hope Solo to Ray Rice.
  Slate Plus
Slate Plus
Sept. 22 2014 1:52 PM Tell Us What You Think About Slate Plus Help us improve our new membership program.
  Arts
Brow Beat
Sept. 22 2014 3:16 PM Watch the Best Part of Beyoncé and Jay Z’s On the Run Tour
  Technology
Future Tense
Sept. 22 2014 12:14 PM Family Court Rules That You Can Serve Someone With Legal Papers Over Facebook
  Health & Science
Medical Examiner
Sept. 22 2014 4:34 PM Here’s Where We Stand With Ebola Even experienced international disaster responders are shocked at how bad it’s gotten.
  Sports
Sports Nut
Sept. 18 2014 11:42 AM Grandmaster Clash One of the most amazing feats in chess history just happened, and no one noticed.