Kenyan activist Boniface Mwangi lights a candle near a replica of a gun and helmets placed on the ground to symbolise Kenyan soldiers serving in the African Union Mission in Somalia (AMISOM), who were killed during an attack last week, at a memorial vigil within the 'Freedom Corner' in Kenya's capital Nairobi, January 21, 2016. Al Shabaab, which is aligned with al Qaeda, said its fighters killed more than 100 Kenyan soldiers when they overrun the base in Ceel Cadde, near the Kenyan border, on Jan 15. REUTERS/Thomas Mukoya Stock Photo