A weekly vigil to raise awareness about forcibly disappeared activists during the 1980s and 90s in Turkey marks its 1,000th gathering in central Istanbul on Saturday. Opposition parties and rights groups are expected to join the vigil. Relatives and family members of those who disappeared after the 1980 military coup and during the 1990s in Turkey’s mainly Kurdish south-east, have been gathering since 1995. The group, known as the Saturday Mothers, meets in Galatasaray Square every Saturday for a peaceful vigil. They demand an independent investigation into the fate of their missing children a…