In the last few weeks there have been fresh killings in the south and bombings.
Livingstone earned praise for his condemnation of the 2005 terrorist bombings on London's transport system.
As well as those killed in the 12 bombings on 12 March, 1993, another 700 people were wounded.
Suicide and roadside bombings have increased in Afghanistan, making this the most violent year since 2001.
There have been no reliable reports in Xinjiang of suicide-bombings, a hallmark of Islamist fanaticism.
The latest sign of disorder: A wave of car bombings that kills dozens in Baghdad.
So far, no link has been found between Todashev and the Boston Marathon bombings.
The Israeli move came a day after two Hamas suicide bombings killed 15 Israelis.
If you listened to the news everyday you'd have no hope from the bombings or corruption.
CNN: Filmmaker aims to explode Africa 'bombs and bullets' myth
The group was accused of bombings of federal buildings, including the U.S. Capitol and the Pentagon.
She has said she believes her sons were framed and weren't responsible for the bombings.
After the deadly Boston Marathon bombings, the FBI began questioning and following Todashev and Taramov.
Shortly after the Boston Marathon bombings, news media were quick to point out their Chechen background.
FORBES: Chechen Leader Says Boston Bombers Got What They Deserved
It has claimed to be behind most of the suicide bombings during the conflict.
BBC: Syria crisis: Bashar al-Assad says West will 'pay price'
Yet the Pentagon doesn't consider large bombings like that one an example of sectarian violence.
Today, in the city of Fallujah, eight people were killed in twin car bombings.
The Boston bombings are a reminder that we live in another age of terror.
Social news site Reddit has issued a public apology for its coverage of the Boston bombings.
All three are accused of removing items from Tsarnaev's dorm room after the bombings.
Yesterday's bombings came as the Group of Eight industrialized nations began its annual meeting.
Security chiefs believe he played a key ideological role in spreading support for suicide bombings.
There they saw the news coverage on the bombings, wallpapered with photos of the two suspects.
Singh was arrested in 1990 after bombings in Lahore and Faisalabad, Pakistan, that killed 14 people.
Mr. Singh was arrested in 1990 after bombings in Lahore and Faisalabad that killed 14 people.
Kadyrbayev said he knew instantly that his friend was indeed involved in the bombings.
He died after a shootout with police four days after the April 15 bombings.
Comments from al-Zawahiri follow, in which he claims direct responsibility for the London bombings.
But similar checkpoints did not stop the large-scale bombings that recently hit the capital.
His 19-year-old brother, Dzhokhar A. Tsarnaev is the second suspect in the Boston Marathon Bombings.
FORBES: Report: Boston Marathon Bombing Suspect No. 1 Tamerlan Tsarnaev Trained to Box for U.S.
Meanwhile, there are questions as to whether the authorities did enough to prevent the bombings.
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