By Mick Krever, CNN
Who did it, and what was their motive?
Those are the two questions being asked by Americans, even President Obama, on Tuesday, the day after a deadly bombing at the finish line of the Boston Marathon.
Don Borelli, a former senior FBI official, said it was too early to draw any conclusions, but suggested that the nature of the attack has him leaning towards domestic – instead of international – terrorism.
“These devices were not the typical type things that [are made by people] that have been trained in Pakistan or Afghanistan,” Borelli, who is now Chief Operating Office of The Soufan Group, said.
“These were more crude, pipe-bomb-type explosives, possibly with black powder, with shrapnel. Plans to make these are readily available on the internet.”
The attack in Boston was the first such bombing in the United States since 9/11.
For Jim Murphy, the UK Labor Party’s top defense official, the attack immediately brought back memories of the 7/7 attacks on the London mass transit system in 2005.
“Here in London there’s a sense of shock,” he said. “There’s a sense of shock across the whole of the U.K.”
London Marathon is set to be held this Sunday, and Murphy is planning to run the 26.2 miles for the first time in his life.
“There’s a real determination to, yes, review security, but continue on as normal,” Murphy said.
American security agencies will be urgently reviewing any piece of evidence that can give them an indication about the cause of Monday’s explosions – more than 24 hours later, there is still precious little information.
“First and foremost, they have to take care of the crime scene, because the crime scene is perishable,” Borelli said of law enforcement’s first steps.
“Then the videos: Surveillance cameras that are fixed to buildings, but also cameras that people have [used to take] photos and video shots,” he said. “They’ll be looking at traffic from the cell phone towers to try to put together a timeline of activity.”
In the rush to find a culprit and motivation, Borelli said the process is not unlike medical triage: Prioritize what will get you the most results, then do it.