NASA said it was scrapping Tuesday's plans to launch Artemis, the US return to the moon after five decades, noting concerns about a tropical storm headed to Florida.
Tropical Storm Ian is expected to hit Florida, home to the Kennedy Space Center, next week, according to the US National Hurricane Center.
Apart from weather and technical challenges like a fuel leak, Artemis I, the uncrewed test flight, signals a major turning point for NASA's post-Apollo human spaceflight programme, after decades focused on low-Earth orbit with space shuttles and the International Space Station.
Artemis will be headed to the moon, as a stepping stone for a future flight to Mars.
Named for the goddess who was Apollo's twin sister in ancient Greek mythology, Artemis aims to return astronauts to the moon's surface as early as 2025, though many experts believe that time frame will likely slip.
Venezuelan President Nicolas Maduro was due to appear in a US court on Monday after his weekend capture by American forces, with US President Donald Trump leaving open the possibility of another incursion if the United States doesn't get its way with the country's interim leader.
Pressure was building for answers on Monday from the investigation into a New Year bar fire in a Swiss ski resort that killed 40 people, after authorities said they had now identified all the victims, most of whom were teenagers.
Snowfall disrupted air, train and road traffic in the Netherlands on Monday, as hundreds of flights were cancelled and trains around Amsterdam came to a standstill.
An overnight Russian air attack on Kyiv and its region killed two people, Ukraine’s authorities saidon Monday, in what appeared to be the first reported deaths in Russian strikes on the Ukrainian capital this year.
US President Donald Trump on Sunday threatened military action against Colombia's government, telling reporters that such an operation "sounds good to me".