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.)

Timothy Noah is a former Slate staffer. His  book about income inequality is The Great Divergence.

TODAY IN SLATE

Politics

Smash and Grab

Will competitive Senate contests in Kansas and South Dakota lead to more late-breaking races in future elections?

Stop Panicking. America Is Now in Very Good Shape to Respond to the Ebola Crisis.

The 2014 Kansas City Royals Show the Value of Building a Mediocre Baseball Team

The GOP Won’t Win Any Black Votes With Its New “Willie Horton” Ad

Sleater-Kinney Was Once America’s Best Rock Band

Can it be again?

Technocracy

Forget Oculus Rift

This $25 cardboard box turns your phone into an incredibly fun virtual reality experience.

One of Putin’s Favorite Oligarchs Wants to Start an Orthodox Christian Fox News

These Companies in Japan Are More Than 1,000 Years Old

Trending News Channel
Oct. 20 2014 6:17 PM Watch Flashes of Lightning Created in a Lab  
  News & Politics
Politics
Oct. 20 2014 8:14 PM You Should Be Optimistic About Ebola Don’t panic. Here are all the signs that the U.S. is containing the disease.
  Business
Moneybox
Oct. 20 2014 7:23 PM Chipotle’s Magical Burrito Empire Keeps Growing, Might Be Slowing
  Life
Outward
Oct. 20 2014 3:16 PM The Catholic Church Is Changing, and Celibate Gays Are Leading the Way
  Double X
The XX Factor
Oct. 20 2014 6:17 PM I Am 25. I Don't Work at Facebook. My Doctors Want Me to Freeze My Eggs.
  Slate Plus
Tv Club
Oct. 20 2014 7:15 AM The Slate Doctor Who Podcast: Episode 9 A spoiler-filled discussion of "Flatline."
  Arts
Brow Beat
Oct. 20 2014 9:13 PM The Smart, Talented, and Utterly Hilarious Leslie Jones Is SNL’s Newest Cast Member
  Technology
Technocracy
Oct. 20 2014 11:36 PM Forget Oculus Rift This $25 cardboard box turns your phone into an incredibly fun virtual-reality experience.
  Health & Science
Medical Examiner
Oct. 20 2014 11:46 AM Is Anybody Watching My Do-Gooding? The difference between being a hero and being an altruist.
  Sports
Sports Nut
Oct. 20 2014 5:09 PM Keepaway, on Three. Ready—Break! On his record-breaking touchdown pass, Peyton Manning couldn’t even leave the celebration to chance.