The psychotherapist and humanitarian was detained on a trip to Damascus in 2017 and his family has not heard from him since.
![Assad poster [Getty]](/sites/default/files/styles/image_156x88/public/media/images/3630DD7E-7575-4053-B278-6A44D770F4FD.jpg?h=d1cb525d&itok=n_GBF9Tj "Assad poster [Getty]")
![US forces, accompanied by Kurdish People's Protection Units (YPG) fighters, near the northern Syrian village of Darbasiyah, on the border with Turkey on 28 April 2017. [Getty]](/sites/default/files/styles/image_156x88/public/2021-09/GettyImages-674511788.jpg?h=199d8c1f&itok=YVehEXpy)
