The received wisdom is that the Tsarnaev brothers began their attack on the Boston Marathon to advance the cause of their fellow Chechens, writes Pete Lentini.

The FBI was alerted by Russia's security services to serious concerns about one of the Boston bomb suspects as recently as November, it was claimed yesterday.

Musician Amanda Palmer has been met with a flood of angry responses after writing a poem for one of the suspected Boston bombers.

The hunt for the Boston bombing suspects was successful through a combination of technology, public co-operation and sheer luck.

Hours after the first grainy images of the two men were released to the public, a portrait quickly emerged the men suspected of the deadly Boston Marathon bombing.

Still stunned and with tears streaming down their faces, the people of Boston rose to their feet in defiance yesterday as President Barack Obama promised to track down those responsible for the bombings at Tuesday's marathon.

Extra police and security staff will be stationed along the route of the London Marathon tomorrow as one of many extra measures being taken by race organisers after consultations with the Metropolitan Police and the Mayor's office.

The recipe is straightforward. First you take a small quantity of explosives made from cleaning fluid and place it in a pressure cooker with a liberal helping of small metal objects, such as ball bearings or nails.

An eerie but as-yet-unverified photograph has emerged of what appears to be one of the Boston bombing suspects (circled in red) just metres from the 8-year-old victim Martin Richard (circled in blue).

Extra alertness after the Boston bombing will deter attacks, but the nature of big public events means they remain exposed to danger.

One of the most graphic images to emerge from the Boston Marathon bombings was of a young man who appeared to have lost both his legs.

The Boston bombings have reaffirmed Australia's commitment to its burgeoning counter-intelligence agency, which is preparing to move.

British police are reviewing security plans for Sunday's London Marathon, the next major international marathon, because of the Boston bombings.

For many years Mokhtar Belmokhtar was little more than a footnote in the intelligence reports analysing the increasingly muscular presence of Islamist groups in Saharan Africa.

Canada is investigating a claim by the Algerian Prime Minister that one of its citizens co-ordinated the terrorist raid at the Saharan gas plant.

The thriller Zero Dark Thirty hunted down top spot at the North American box office - and easily won it.

Three weeks before the ceremony and the [Olympic Stadium] was packed with thousands of people all doing things impressively.

The British-Iraqi man killed in last month's quadruple Alps shooting had access to a bank account linked to Iraq dictator Saddam Hussein.

The parents of triplets who died in the Doha mall fire have made an emotional plea for justice after the trial over their deaths was delayed for a third time.

The hearing into the fatal fire at Doha's Villaggio mall which killed 19 people including three Kiwi triplets has been postponed for a third time.

A service to mark today's 10th anniversary of the Bali bombing in which three New Zealanders died was a moving reminder of the tragedy, Foreign Minister Murray McCully says.