https://phys.org/news/2018-11-facebook-alleged-russian-early.html

Facebook chief executive Mark Zuckerberg refused to attend the meeting and organisers pulled up an empty chair in front of a spot featuring his nameplate at the shoehorn-shaped table in the House of Commons committee room in London.

Zuckerberg's company is reeling from a series of crises linked to its handling of alleged Russian meddling in both the 2016 US presidential election and that year's British referendum on leaving the EU.