An American tourist has shared a photo of herself with Pc Keith Palmer outside Parliament.
Donald Trump has said "it's a great day for American jobs" after his administration issued a permit to build the long-delayed Keystone XL oil pipeline.
Researchers believe most cancer mutations are due to random DNA copying mistakes.
Astronauts have ventured out on a spacewalk to prepare the International Space Station for a new parking spot.
Vladimir Putin has held a surprise meeting with France's far-right presidential candidate Marine Le Pen
The widow of a man slashed in the face by Khalid Masood told how she felt "sick" after hearing he went on to commit the atrocity in Westminster.
A railway worker narrowly avoided being hit by a train travelling at 85mph.
Royal Dutch Shell's Nigeria subsidiary "fiercely opposed" environmental testing and is concealing data showing thousands of Nigerians are exposed to health hazards from oil spills, according to a geologist.
Former Egyptian president Hosni Mubarak has returned home following his release from custody, security officials said, after legal proceedings that took years during which the country witnessed major upheaval.
The Trump administration has issued a presidential permit to pipeline builder TransCanada to build the Keystone XL pipeline.
Belgian authorities have charged a man with terror offences after a car was driven at high speed through a busy shopping area in Antwerp.
The fourth victim has been named.
He said Brexit must not be the beginning of a process which leads to further splits in the EU
Masood was jailed for two years over the 2000 attack.
Hundreds of migrants are feared to have died off the coast of Libya after five bodies were found near two capsized boats
Kremlin critic Denis Voronenkov was killed by a Russian agent, according to a senior Ukrainian official.
Passengers said the driver gave regular updates and opened windows.
Donald Trump has issued an ultimatum as the situation escalates.
The fifth person to be killed in the Westminster terror attack was pensioner Leslie Rhodes.
"I have heard nothing that suggests to me that it would have been possible to stop it."
A Sydney teenager has admitted plotting a terrorist attack on an Australian ceremony marking the Gallipoli landings.
Latest: Four people were killed in the attack in Westminster yesterday. These were: Aysha Frade, 43; a man in his mid 50s, PC Keith Palmer and the attacker.
Police have charged a man over the mysterious disappearance of a toddler from an Australian beach nearly 50 years ago.
And it’s blowing people’s minds.
Radoslaw Sikorski posted a video to Twitter purporting to show people lying injured in the road on Westminster Bridge.
Latest: The man police believe to be behind the terrorist attack in Westminster has been formally identified as 52-year-old Khalid Masood.
"…If you open your door to uncontrolled immigration from Middle Eastern countries, you are inviting in terrorism."
Latest: A 75-year-old man who was injured in the Westminster terror attack has died in hospital, Scotland Yard said.
A group of 29 inmates have tunnelled their way out of a prison in the northern Mexico border state of Tamaulipas.