Investigation

The U.N. concluded two of its investigators, an American and a Swede, were killed in a random ambush in Congo. But evidence suggests they may have walked into a government trap.

The airstrikes on oil trucks in Islamic State-controlled areas employed the toxic material, which has been accused of causing cancer and birth defects.

A New York tycoon won a sweetheart deal to build a massive "sustainable" palm oil plantation in Cameroon. What followed were accusations of intimidation, corruption, bribery, and deceit. 

How Azerbaijan's dictator woos the United States and Europe.

Three years after Fukushima, Japanese officials insist their nuclear facilities are safe. They're not.

Why is the U.N. censoring its own Syria news?

This obscure FBI unit does the domestic surveillance that no other intelligence agency can touch.

How maritime unions sunk America’s food aid reform.

The untold story of al-Shabab's murderous attack on the U.N. in Mogadishu.

India is flooding the world with tainted drugs -- and getting away with it.

The Kafka-esque story of the U.S. translators being held against their will in a Kuwaiti hangar.

Blame profits, politics -- and a huge growth in secrecy-obsessed institutions.

...along with Muhammad Ali, Martin Luther King, and a Washington Post humorist.

Inside Gen. Keith Alexander's all-out, barely-legal drive to build the ultimate spy machine.

USAID's first known war-zone-related suicide raises troubling questions about whether America is doing enough to assist its relief workers.

The U.S. knew Hussein was launching some of the worst chemical attacks in history -- and still gave him a hand.

The U.S. has spent hundreds of millions fighting Yemen's terrorists. What did it buy, really?

Is Huawei wiring Africa for surveillance? Or just for money?

When the NSA can't break into your computer, these guys break into your house.

That's why it sucks up information on everyone.