He has worked closely with other survivors, and with organisations representing the families of Srebrenica victims, to design and build the memorial, which contains 10,000 burial sites designated for victims.
Hasan lucrează alături de alţi supravieţuitori şi cu organizaţii reprezentând familiile victimelor de la Srebreniţa, pentru a proiecta şi construi mausoleul, care găzduieşte 10.000 de morminte pentru victime.