Michael Kamber for The New York Times
Open sewers line a street in Ndjamena, Chad, and trash is everywhere. Chad weakened a law that devoted most of its oil money to cutting poverty.
Michael Kamber for The New York Times
The scene in a poor district in Ndjamena, Chad's capital. Much of the nation's oil wealth has been eaten up by mismanagement and corruption.
Jacob Silberberg/Panos
Tanks remove water from oil at the Kome 5 facility run by Exxon Mobil. Chad wants the Exxon consortium to put royalties into its central bank.