Aggression builds up as in a pressure-cooker, and the group selects its victims without mercy.
Officials said Mr. Tsarnaev said the brothers built their pressure-cooker bombs in the older brother's Cambridge, Mass.
Every couple has its Achilles' heel, that pressure-cooker situation that brings out the worst in two people.
Gonzalez came up with one big play after another, and Besler looked comfortable in the Azteca pressure-cooker.
First, Northridge was a sleepy, third-tier commuter school with nothing like the pressure-cooker politics of its elite neighbor.
Is it a sailboat, a puppy, two guys with pressure-cooker bombs or just an unintelligible mess of dots?
And there was 13 pressure-cooker bombings in India, Bombay, Delhi, Madras and also Jaipur among other cities, major cities.
The suspects grabbed a backpack, apparently from the Honda, pulled out a pressure-cooker bomb and placed it on the ground.
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Residents flooded the streets in relief four days after the two pressure-cooker bombs packed with nails and other shrapnel went off.
Dzhokhar Tsarnaev, 19, is charged with joining with his older brother, Tamerlan, who's now dead, in setting off the shrapnel-packed pressure-cooker bombs.
The Boston bombers used hobby fuses and a radio controller for a toy car to detonate the pressure-cooker bombs, the report said.
Authorities later announce that they recovered a pressure-cooker bomb after the pursuit into Watertown, a source briefed on the ongoing investigation said.
The police also later found the pressure-cooker bomb at the gunfire scene.
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In addition, instructions for making pressure-cooker bombs are available on the Internet.
But whatever drove them to allegedly set off two pressure-cooker bombs, their uncle is certain Dzhokhar was not the one pulling the strings.
In their stolen SUV they had five pipe bombs and a pressure-cooker explosive like the ones that blew up at the marathon, Kelly said.
The search comes amid US media reports that investigators are analysing female DNA found on a piece of the pressure-cooker bombs used in the attacks.
He was accused of joining with his brother in setting off the shrapnel-packed pressure-cooker bombs that killed three people and wounded more than 200 a week ago.
Authorities found a pressure-cooker lid, believed to have been part of a bomb, that was catapulted onto the roof of a nearby building, a person briefed on the investigation said Wednesday.
As far as these pressure-cooker bombings are common by the al Qaeda Lashkar-e-Taiba, and this happened yesterday after just 24 hours before in Boston, in Bangalore in India, and scores were injured.
He could get the death penalty if convicted of plotting with his older brother, now dead, to set off the pressure-cooker bombs that killed three people and wounded more than 260 on April 15.
Such verbal exchanges add to the pressure-cooker atmosphere in the region, where North Korea's bellicose rhetoric over threatened nuclear attacks has kept the country's neighbors and the U.S. on their toes in recent weeks.
And technology yielded the first major break: Police found photos and even a surveillance video of the two suspects toting backpacks -- each ostensibly loaded with a pressure-cooker bomb -- at the marathon's home stretch.
The younger Mr. Tsarnaev allegedly told interrogators that he and his brother wanted to detonate up to six more devices in Times Square, Mr. Kelly said, including five pipe bombs and one pressure-cooker bomb similar to the two used in the attack on the marathon.
"I had a very clear view of them standing up with backpacks under them that also had additional ammunition and explosives and I could see them bending down and reaching in and getting things out of their backpacks, which included their explosives and their pressure-cooker bomb, " Mr Fitzenberg said.
"It's going to be a short-lived Knesset, a pressure cooker, a national-paralysis-government, " he said.
"It was an insane time, in an insane area -- an intense pressure cooker, " Rothenberg said of the era.
"I'm very hesitant to give him advice because he has matured in a pressure cooker, " the 55-year-old Mr. Proctor says of his son.
They have released images that appear to show the remains of a dark-coloured backpack and a pressure cooker, as well as a triggering mechanism.
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