Barack Obama makes first Afghanistan visit

US President Barack Obama has arrived in Afghanistan on his first visit to the country since taking office.

During his brief trip, he is expected to press Afghan President Hamid Karzai to do more to tackle corruption and drugs trafficking, officials say.

He is also due to address US forces based in Afghanistan and US officials.

In December, Mr Obama ordered the deployment of an extra 30,000 US troops to Afghanistan and set a date of mid-2011 to begin troop withdrawal.

Only a few thousand of the extra forces have arrived so far, with most expected to be in place by the summer.