Four astronauts are buckling up for an unexpected return from the International Space Station (ISS) after one of them suffered a “serious medical condition”.

Donald Trump has said he believes Iran’s regime could fall following weeks of unrest across the country, as the US president considers whether to intervene.

The UK has deployed a military officer to Greenland as Denmark and its European allies seek to counter Donald Trump’s threats to take the territory, after talks at the White House ended with “fundamental disagreement”.

The US is suspending the process for immigrant visas from 75 countries, the Department of State said on Wednesday.

Donald Trump has again restated his desire to acquire Greenland for the US “for purpose of national security”, saying anything less is “unacceptable”, even as a poll found less than a fifth of Americans support the idea.

Donald Trump’s first year back in office has been full of twists and turns, from hefty tariff threats to unprecedented military interventions.

The White House has defended Donald Trump’s “appropriate” response to a heckler during a visit to a Ford manufacturing plant in Michigan.