Retrieved 12 September 2013. ↑ Aydınlık, 12 September 2013, Al-Nusra Linked to Chemical Production in Turkey Archived 20 September 2013 at the Wayback Machine. ↑ Hurriyet Daily News, 12 September 2013, Syrian rebel groups sought to buy materials for chemical weapons, prosecutors say ↑ Patrick J. McDonnell, Los Angeles Times, 13 September 2013, Syrian rebel groups sought sarin gas material, Turkish prosecutors say ↑ Gladstone, Rick (30 May 2012).