US plans full troop pullout from Afghanistan
US President Barack Obama has warned his Afghan counterpart that the US may pull out all its troops by the end of the year. Hamid Karzai has so far refused to sign a security agreement - which the U-S insists must be in place before it commits to leaving some troops behind Most foreign troops are due to leave Afghanistan by the end of 2014. Al Jazeera's Patty Culhane reports from Washington DC.