World in Progress: Collapsing houses in Nairobi
| 06:07 mins.
Many poor people in Narobi, Kenya, live in apartment buildings that are unsafe. Warning signals, like cracks in the walls, are often overlooked, or played down by the landllords. But a number of tenement buildings have collapsed over the past few months, and several dozen people have been killed because they were not able to leave their homes in time.