When London was attacked by terrorists in the final days of the British general election campaign, it was the second attack to take place during the campaign.

Susan Glasser, the chief international columnist for Politico, has followed politics in Washington DC for over 20 years – in late May she travelled to the UK to bring an American perspective to the election and to present a documentary about it. The assumption was it would focus on the scale of Theresa May’s anticipated landslide for her Conservative Party.

But on May 22nd, as she was packing her bags to fly to London, news began to break of a terrorist attack in the UK that would change all of that. By the time the overnight flight had landed, the campaign had been suspended.

(Photo: People pass a mock ballot box erected to encourage people to vote, Bristol, 2012. Credit: Matt Cardy/Getty Images)