Taliban kill six literacy workers in Afghanistan: officials --- (Reuters) - Taliban militants gunned down and killed six people in Afghanistan working on a government-backed literacy project in the northern province of Faryab, officials said on Wednesday. -- "They were travelling this morning to observe a literacy project when the Taliban stopped their car and shot them," said provincial police chief Nabi Jan Mullahkhil. -- The victims worked for a French aid group involved in the project, and just one of the seven workers gunned down survived, the Ministry of Rural Rehabilitation and Development said. --- The United States is threatening to pull out all its troops unless the deal is clinched by the end of the year. -- A U.S. exit could prompt others to follow, and make aid donors reluctant to provide more funds as corruption is rampant and deteriorating security makes it harder to monitor cash flows. Despite the billions invested in rebuilding the war-ravaged nation, Afghanistan remains dependent on foreign aid. - More