Facebook's vice-president of content policy, Monika Bickert, spoke to the BBC about the site.
Ian Russell, whose daughter killed herself after looking at self-harm content, speaks to Frances Haugen - a Facebook whistle blower.
By Joe Tidy
Cyber reporter, BBC News
Facebook has come under fire for the impact its apps can have on teens and their mental health.
Kafui Adzah's restaurant in Ghana saw a 50% fall in orders when WhatsApp crashed.
Influencers react to Monday's social media outage.
By Jane Wakefield
"It was quite a mess": the company's internal systems also went down, making a fix more difficult
By Cristina Criddle