Texas police have said the gunman who shot 21 people dead at a school last week entered through a door that was supposed to lock, but somehow did not.
The US will send Ukraine more advanced rocket systems to help it defend itself, President Biden has announced.
Donald Trump had cast this year’s primaries as a moment to measure his power, endorsing candidates by the dozen as he sought to maintain an imprint on his party unlike any other past president.
Donald Trump's grip on the Republican party suffered a slip after his handpicked candidate for Georgia governor was trounced at the polls.
Nineteen young children and two adults have died in a shooting at a primary school in south Texas.
Sweden and Finland have the "full, total and complete backing" of the US in their decision to apply for Nato membership, President Joe Biden says.
Elon Musk says if his bid to buy Twitter is successful he will reverse Donald Trump's ban from the platform.
President Biden is asking Congress for $33bn (£27bn) in military, economic and humanitarian assistance to support Ukraine - although he insisted that the US was not "attacking Russia".
In a new interview published Tuesday, former President Donald Trump called on Russian President Vladimir Putin to release any damaging information he has about the Biden family, in a brazen request for domestic political assistance from America's top adversary.
Madeleine Albright, a Czech immigrant who went on to become the first female secretary of state in US history, has died aged 84.
Russia's unmanned Luna-25 spacecraft has crashed into the Moon after spinning out of control, officials say.
Donald Trump has confirmed that he will not take part in Republican presidential debates with his rivals in the race for the White House.