BBC News with Neil Nunes

President Obama is making a surprise visit to Afghanistan on the first anniversary of the death of the al-Qaeda leader Osama bin Laden. He has signed a 10-year strategic partnership agreement with the Afghan leader Hamid Karzai,

setting out

military and civil relations between their two countries after the conclusion of Nato's mission in Afghanistan in 2014. From Washington, Paul Adams.

Air Force One, the

jumbo jet

carrying President Obama, landed at the Bagram airbase north of Kabul. The president then flew onto the Afghan capital by helicopter. He'll only be on the ground for a few hours, but the strategic partnership he and President Karzai have just signed is the product of months of difficult negotiations. Only when differences over night raids by special forces and the handling of prisoners were ironed out did the agreement finally

fall into place

. It's a first symbolic step towards setting out a long-term relationship designed to

reassure

the people of Afghanistan that they are not about to be abandoned when Nato ends its operations there in 18 months' time.

The Libyan government has officially challenged the right of the International Criminal Court to try Colonel Gaddafi's son Saif al-Islam for war crimes. From the Libyan capital Tripoli, Rana Jawad has more details.

A fresh bid from Libya to judges in The Hague, it's unclear when a decision will be made on this latest appeal by Libyan lawyers, but it's believed it could take months. A spokesman from Libya's justice ministry, Nuri al-Bharathi, told the BBC that it's important for Saif al-Islam to be tried on home soil to