A man reacts after seeing his son who was rescued from the Garissa University attack in Kenya's capital Nairobi April 4, 2015. Kenya's President Uhuru Kenyatta said on Saturday that those behind an attack in which al Shabaab Islamist militants killed 148 people at a university were "deeply embedded" in Kenya, and called on Kenyan Muslims to help prevent radicalisation. The stadium is now a crisis centre manned by the Red Cross, for families to find out whether their relatives are alive or dead. REUTERS/Thomas Mukoya