A pause on all US vaccinations with the Johnson & Johnson Covid shot will continue for at least another week after members of a government-convened expert panel said Wednesday they needed more time to assess its possible links to a clotting disorder.

Twitter said Wednesday it was launching an initiative on "responsible machine learning" that will include reviews of algorithmic fairness on the social media platform.

Reviving the Iran nuclear deal would seem like a simple task for US President Joe Biden. Iran wants him to lift sanctions in exchange for Tehran's return to compliance.

President Joe Biden announced Wednesday it's "time to end" America's longest war with the unconditional withdrawal of troops from Afghanistan, where they have spent two decades in a bloody, largely fruitless battle against the Taliban.

Eighteen years after Arnold Schwarzenegger stormed to power, California is likely to hold its second-ever governor recall election -- but this time campaign veterans say the odds are stacked in incumbent Gavin Newsom's favour.

Capitol Police had more intelligence than was previously known ahead of the January 6 riot at Congress but were instructed not to use their most aggressive tactics to repel the mob, a report cited late Tuesday by US media said.

Pfizer has "ramped up production" of its Covid-19 vaccine and can deliver 10 percent more doses than expected to the United States by the end of May, its CEO Albert Bourla said on Tuesday.

Protesters faced off with police for a third night Tuesday in the American city of Minneapolis over the killing of a young Black man shot by an officer, with more than 60 people arrested, law enforcement officials said.

President Joe Biden will remove all US troops from Afghanistan before this year's 20th anniversary of the September 11 attacks, ending America's longest war around five months later than planned, a US official said.

Prosecutors rested their case on Tuesday against Derek Chauvin, the former Minneapolis police officer on trial for murder and manslaughter for the death of George Floyd.

The person who died after being shot at a high school in the US state of Tennessee was a student who started a shoot-out with police, according to federal law enforcement.

The White House on Tuesday played down the impact of a decision to pause the rollout of Johnson & Johnson's Covid-19 vaccine on the wider US vaccination effort.