>> A gunman in Afghan military garb opening fire near a NATO coalition base in Kabul Wednesday, killing a US soldier and an American civilian, and wounding three others. The gunman shot dead when coalition forces returned fire. The Americans killed part of the NATO mission to train and advise Afghan security forces to fight the Taliban insurgency.
The shooter's identity still unclear but over the year members of the Afghan military have killed dozens of American troops in so-called green on blue attacks, most notably in 2014, when US general Harold Greene was shot dead at a base in Kabul, the highest-ranking U.S. soldier killed since the Vietnam War.
More than 8,000 US troops remain in Afghanistan 15 years after the Taliban's fundamentalist regime was toppled in 2001.