Skip to main content

Medical workers aid injured people at the finish line of the 2013 Boston Marathon following two nearby explosions on Monday, April 15, 2013.

Charles Krupa/The Associated Press

The lone-wolf terrorist poses special nightmares for security and intelligence agencies.

Nothing known so far about the twin bombs in Boston that killed three and maimed dozens required more resources than what's easily available to a single crazed individual.

In terms of cost, logistics, sophistication, placement, and timing, a single terrorist – a lone wolf – could have built, tested, and planted the pair of kitchen pressure-cookers crammed with gunpowder and laced with nails to killing and maim innocent spectators lining Boylston Street.

Story continues below advertisement

The two bombs, at least one of which was left in an unremarkable, black, nylon gym bag, could easily have been carried by a single person and left about 200 metres apart, after the final explosives sweep of the race route roughly an hour before the lead runners passed.

Lone-wolf terrorists, especially if they are careful and willing to learn from the mistakes of others, are nearly impossible to detect. There is no network for intelligence agents to intercept, to monitor.

"By far, lone wolves are the biggest concern to security agencies," says Christian Leuprecht, a terrorism expert who teaches at both Queen's University and Royal Military College of Canada in Kingston.

While international Islamic jihadist groups – including al-Qaeda – have urged ideological fellow-travelers to self-train to carry out indiscriminate terrorist attacks, lone wolfs typically are driven individuals with their own agendas.

But lone-wolf terrorism isn't rare. A Dutch terrorism database classified roughly 40 per cent of all terrorist attacks as "lone-wolf" strikes, Dr. Leuprecht said.

As for pressure-cooker bombs, they are common. "We are defusing pressure-cooker bombs almost daily," Shafqat Malik, chief of the bomb disposal squad for Pakistan's Khyber-Pakhtunkhwa province, which includes violence-wracked Peshawar and the Swat Valley, told Reuters.

Plans are widely available online. "How to Make a Bomb in Your Mom's Kitchen," featured pressure cooker bombs and was published in the al-Qaeda backed English-language Inspire magazine 2010 edited by Anwar al-Awlaki, the radical Muslim cleric and U.S. citizen killed by a Hellfire missile in a 2011 drone attack.

Story continues below advertisement

The Boston bombs apparently used ordinary gunpowder or homemade explosive – nowhere near as powerful as plastic explosives but easily available and inexpensive if extracted from shotgun shells or mixed in a basement. Both bombs, including timers and explosive could have been built for a few hundred dollars."

A timer using a digital watch and a battery-powered light bulb filament can serve as a detonator.

Report an error Editorial code of conduct
Due to technical reasons, we have temporarily removed commenting from our articles. We hope to have this fixed soon. Thank you for your patience. If you are looking to give feedback on our new site, please send it along to feedback@globeandmail.com. If you want to write a letter to the editor, please forward to letters@globeandmail.com.

Welcome to The Globe and Mail’s comment community. This is a space where subscribers can engage with each other and Globe staff. Non-subscribers can read and sort comments but will not be able to engage with them in any way. Click here to subscribe.

If you would like to write a letter to the editor, please forward it to letters@globeandmail.com. Readers can also interact with The Globe on Facebook and Twitter .

Welcome to The Globe and Mail’s comment community. This is a space where subscribers can engage with each other and Globe staff. Non-subscribers can read and sort comments but will not be able to engage with them in any way. Click here to subscribe.

If you would like to write a letter to the editor, please forward it to letters@globeandmail.com. Readers can also interact with The Globe on Facebook and Twitter .

Welcome to The Globe and Mail’s comment community. This is a space where subscribers can engage with each other and Globe staff.

We aim to create a safe and valuable space for discussion and debate. That means:

  • Treat others as you wish to be treated
  • Criticize ideas, not people
  • Stay on topic
  • Avoid the use of toxic and offensive language
  • Flag bad behaviour

Comments that violate our community guidelines will be removed.

Read our community guidelines here

Discussion loading ...

Cannabis pro newsletter