Nasa officials gather at Kennedy Space Center in Florida to mark the 25th anniversary of the explosion of space shuttle Challenger.

Five Somali men suspected of hijacking a South Korean cargo ship in the Arabian Sea are flown to Seoul to face possible criminal charges.

Some 99% of South Sudanese have voted to secede from the north, according to the first full count from the landmark independence referendum.

British movie The King's Speech is awarded the top honour at this year's Directors Guild of America Awards.

A blaze at a military arms depot in the Venezuelan city of Maracay injures at least three people, officials say.

The global economy is set for growth, say leaders at the World Economic Forum, but huge risks remain

World leaders call on Egypt's President Hosni Mubarak to avoid violence and enact reforms as protests continue into a sixth day.

Rescue workers in Brazil are searching for three construction workers believed to be trapped under rubble after a 30-storey building they were working on collapsed.