The Taliban is trying to set itself up as a legitimate party, angering the Afghan government which has put peace talks on hold.
The formal transfer of Afghan forces into the lead of the fight in Afghanistan is raising questions about whether they're prepared to fight on their own.
A small Taliban unit assaulted the Kabul airport just before dawn today. Afghan police and Army units handled the response.
Afghan insurgent group Hizb-e-Islami claimed responsibility for the attack, saying it plans further attacks against foreign troops.
US Secretary of State Kerry and Russia's Foreign Minister Lavrov say they hope to convene an international conference on Syria later in May. The US has also stepped up humanitarian aid.