We look at the hurdles facing the warring parties ahead of the international-led negotiations in Geneva. Adrian Finighan speaks to Ammar Waqqaf, a Syrian political activist who supports the Syrian government; Joshua Landis, the director of the Centre for Middle East Studies and a professor at the University of Oklahoma; and Radwan Ziadeh, the director of the Syrian Centre for Political And Strategic Studies. Ziadeh is also the head of the Syrian Commission for Transitional Justice.