Twitter shares are priced at $26 in the biggest market debut of technology firm since Facebook went public in 2012.

Wall Street Market Report

Police in Brazil charge Justin Bieber with illegally spraying graffiti on the wall of an abandoned hotel in Rio de Janeiro.

A task of extraordinary delicacy and danger is about to begin at the Fukushima nuclear power station.

Amnesty International says major oil firms wrongly blame spills in Nigeria on sabotage to avoid paying compensation, a claim Shell denies.

Mexico's Supreme Court overturns a decision by an appeals court to free drug baron Rafael Caro Quintero three months ago, who is now a fugitive.

World powers and Iran are due to hold a new round of talks in Geneva over Tehran's controversial nuclear programme.

A torch for the Sochi Winter Olympics blasts off into space - as part of efforts to showcase next year's games in Russia.