"If police tell you to run, run." The officer's chilling instruction rang out across the quadrangle in the Commons below Big Ben.
Megan Levy One moment the footage shows a typical and instantly recognisable London scene: red double decker buses travelling across Westminster Bridge in the heart of the British capital.
Josephine Tovey Police investigations are ongoing into an attack in London on Wednesday.
Kate Aubusson She's the scientist who was appointed as editor to almost 50 academic journals. Trouble is she doesn't exist
Megan Levy A British politician whose brother died in the Bali bombings in 2002 desperately attempted to resuscitate a critically injured police officer who was stabbed in a terrorist attack outside the Houses of Parliament in the heart of London.
Nick Miller Front pages reflected a mood of shock at how close terror had come to the heart of its political life and history.
Paul McGeough At a conference, at which Foreign Affairs Minister Julie Bishop represented Australia, Tillerson spoke of setting up "interim zones of stability" for returning refugees.
Kelsey Munro The militants came to the town in the dark. The girls, aged between 16 and 18, were at their boarding school, studying for their final exams.
Nick Miller Terror attacks may have become easier. But society is now more resilient.
Nick Miller The terror threat level in the UK has been at severe - meaning an attack is 'highly likely' - since 2014.