As the London Tube attack reminds us, public transit is a plum target for terrorists.

The suspect was allegedly arrested two weeks ago near the attack before being freed.

Donald Trump has suggested Scotland Yard knew about the Green Tube bombing perpetrators.

Erika Pinfold was going to Parsons Green station when the tube terror attack happened.

Incorporate a "what if" scenario into your travel plans in case of terrorist attacks.

Documentary reveals why Osama bin Laden became evil mastermind behind 9/11 attacks.

Terrorists could break into the British Parliament in under five minutes.

British paramedics to start carrying antidote to deadly nerve gas amid fears in Britain.

The tourist rushed to aid the boy, believed to be young Australian Julian Cadman.

EDITORIAL: Motor vehicles have become an easy instrument of terror.

The "ideal vehicle" would be large in size and with a raised chassis that can clear curbs.

The family of young Australian boy is calling for help to find him after terror attack.

The chilling new reality of urban life: vehicles transformed into weapons of mass murder.

Man with a knife killed two people and wounded at least six in Finland.

The first named victim of the terror attack in Barcelona is Bruno Gulotta, father of two.

Witnesses tell of how a carefree afternoon turned into bloodbath along tourist spot.

GRAPHIC WARNING: Horrified onlookers can be seen running for their lives.

A New Zealander in Barcelona says "it's absolute chaos" in city.

Paul Jackson was shocked to learn it was his flight that was supposed to have bomb aboard.

A man charged over a NSW-based terror conspiracy tried to have his brother take a bomb.

Senior member of Islamic State in Syria was behind Sydney airport bomb plot, say police.

Aly criticised after labelling Turnbull's action against terrorism as 'over-hyped'.

Kiwi travellers are reporting record queues and traffic at Australian airports.

A key element for a devastating weapon was missing in Mosul.

Iraq Prime Minister Haider Al-Abadi has declared victory over the Islamic State in Mosul.

Picture was taken moments before the suicide bomber blew herself up, with her baby.

London Bridge 'hero' spits at man in video and claims he is a member of far-right group.

Policeman who bravely fought off 3 terrorists says if felt like "a scene from a film".

Governments in India have taken to suspending broadband services.

More than 40 convicted terrorists have used human rights laws to remain in UK.