Abba on new album Voyage: We don't need to prove anything

Some grieved, some helped and some worried. Two decades after the terror attacks on the United States on 11 September, 2001, four people from around the world reflect on how they reacted that day, and what’s changed since. Video by Alexandra Ostasiewicz and Dan Lytwyn

Scientists carrying out HIV research in the Democratic Republic of Congo have discovered a rare group of people who could potentially unlock new treatments to tackle the virus. Known as HIV controllers the group tested positive for HIV antibodies but they had a low to non-detectable viral load without the use of medication. The head…

Hamas is co-operating with international mediators to achieve a ceasefire and calm, a spokesperson for the Islamist militant group which runs Gaza has said. Bassem Naeem told BBC World News: “The key is very simple, to withdraw the security forces from the al-Aqsa compound and to stop ethnic cleansing of Palestinian people from Sheikh Jarrah.”…

Younger people may be offered alternative vaccines to the AstraZeneca jab, says Prof Paul Hunter.

Victims of ransomware gangs are being urged to report it rather than pay the criminals behind the attacks. The gangs use malicious software to scramble and steal an organisation’s computer data and demand money to restore it. Megan Stifel, executive director of the Global Cyber Alliance, which seeks to reduce cyber risk, told BBC World…

BBC Click’s LJ Rich looks at the best of the week’s technology news stories including: YouTube announces it will remove videos containing vaccine misinformation for all approved vaccines, expanding on its ban of false claims about Covid-19 jabs A new law to stop workers being fired if they are not meeting productivity targets set by…