On 26 May , Omar Iman Abubakr stepped down as chairman .
On 26 May , Omar Iman Abubakr handed over his position to Sheikh Aweys , who was by then clearly the most powerful figure in the group .
On 26 May , Omar Iman Abubakr stepped down as chairman and handed over his position to Sheikh Aweys , who was by then clearly the most powerful figure in the group .