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.
Israeli Prime Minister Benjamin Netanyahu said the ceasefire in Gaza would end and the military would resume fighting Hamas until it was defeated if the Palestinian group did not release hostages by midday Saturday.
The United Nations said on Tuesday that one of its staff members had died in detention in northern Yemen, where the UN has repeatedly called for the Houthi movement to free detained UN employees.
Government offices, schools and workplaces fell silent in Sweden at midday on Tuesday in remembrance of the victims of a mass shooting at an adult education centre last week when a gunman killed 10 people before turning his weapon on himself.
UN Secretary-General Antonio Guterres urged Hamas to continue with the planned release of hostages on Tuesday, a day after the group announced its intention to halt the exchange.
US President Donald Trump substantially raised tariffs on steel and aluminum imports to a flat 25 per cent "without exceptions or exemptions" in a move to aid the struggling industries but which increases the risk of a multi-front trade war.