*) Tech titans under fire in Congress over monopoly allegations

Tech giants have “too much power” and need to be regulated.

That was the conclusion of Washington lawmakers after they grilled the CEOs of Google, Facebook, Amazon and Apple virtually at a congressional hearing.

Despite the committee’s concerns over privacy, competition and the content allowed online, there were few new revelations or major confrontations.

*) China's Sinopharm to test potential Covid-19 vaccine in Brazil

Chinese drug company Sinopharm and Brazil’s Parana state have agreed to launch the fourth major Covid-19 vaccine trial in the country.

They will seek regulatory approval in the next two weeks, the Brazilian partners said.

Sinopharm's candidate vaccine is already being tested in the United Arab Emirates with 15,000 volunteers.

*) US to withdraw around 12,000 troops from Germany

The US will be withdrawing nearly 12,000 troops from Germany, with plans to reposition almost half of them in Europe.

US President Trump accused Germany of taking advantage of the US and being “delinquent” in paying the two percent NATO fee.

Pentagon officials say the plan is costly and will take years to execute while US lawmakers fear it will weaken the military against Russia.

*) US federal forces to start conditional pullout from Portland

Staying with US troop pullouts, the Trump administration has agreed to withdraw federal forces from the US city of Portland.

Oregon Governor Kate Brown said the forces would begin their phased pullout on Thursday.

But a Homeland Security official indicated that officers will withdraw only if local police can ensure the federal courthouse will be secured.

Trump's administration earlier this month sent the federal tactical teams to intervene after weeks of protests against racism and police brutality.

And finally,

*) Scientists solve mystery of the origin of Stonehenge megaliths

Scientists have solved a mystery about Stonehenge, determining the place of origin of many of the megaliths that make up the monument in Wiltshire, England.

Geochemical testing indicates the sandstone megaliths share a common origin about 25 km away at a site called West Wood.

This is thanks to a core sample that had been kept in the United States for decades.