A boy watches as Kenyan authorities demolish a building in the Mathare neighbourhood of Nairobi, Kenya, May 17, 2016. Kenya's authorities tore down the badly built residential block in a poor Nairobi district on Tuesday, one of more than 250 shoddy buildings that could now face demolition after a six-story structure collapsed this month killing 51 people. REUTERS/Goran Tomasevic SEARCH "MATHARE DEMOLITION" FOR THIS STORY. SEARCH "THE WIDER IMAGE" FOR ALL STORIES TPX IMAGES OF THE DAY