US President Barack Obama and Afghan counterpart Hamid Karzai
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US to accelerate Afghan troop transition

US troops in Afghanistan will end "most" combat operations this spring, US President Barack Obama and Afghan counterpart Hamid Karzai have agreed.

American forces are expected to switch to a support role, slightly earlier than originally scheduled, as Afghan troops take the security lead.

The two leaders also backed the holding of talks between the Afghan government and Taliban leaders in Doha, Qatar.

Ian Pannell reports.