Deadly Alliance*

Part 1: The U.S. government and the weapons industry knowingly allowed workers to be exposed to unsafe levels of the toxic metal beryllium, resulting in dozens of deaths.

Part 2: Industry and defense officials twist a proposal to protect beryllium workers into a secret deal protecting themselves.

Part 3: The nation's leading producer of beryllium has misled workers, regulators and the public about the risks.

Part 4: A beryllium producer tries to control how doctors, scientists and the public view the metal.

Part 5: The final days of Marilyn Miller, who contracted beryllium disease while working as a secretary in a beryllium plant.

Part 6: Public officials are quick to give a beryllium producer tax breaks.

Impact and reaction

*Pulitzer Prize finalist for Investigative Reporting, 2000

Who killed Supercar?

Part 1: An 80-mpg vehicle was supposed to address climate change. Instead, it's a sobering reminder of the forces arrayed against a cleaner environment.

Part 1: An 80-mpg car was supposed to address climate change. But it's a sobering reminder of the forces arrayed against a cleaner environment.

Part 2: Battered from all sides, Supercar sputters along.

Part 3: Political obstacle course proves fatal for Supercar.

Mercury menace

Part 1: Chicago Tribune testing shows seafood routinely contains unsafe levels on mercury.

Part 2: Regulators issue flawed warnings and set policies aiding industry.

Part 3: Canned tuna is more hazardous than authorities have disclosed.

Impact and reaction

'Disaster waiting to happen'

Workers in the the electronics, recycling, machining and dental industries have been harmed by the deadly metal beryllium.

Impact and reaction

Military exposed to toxic dust

U.S. military personnel have been exposed to the highly toxic metal beryllium at dozens of Army, Air Force, Navy and Marine Corps facilities.

Impact and reaction

Toxic dust hits inspectors

OSHA, long criticized for downplaying the dangers of beryllium, discovers its employees have been affected.

Impact and reaction

The Bomb's fallout

How thousands of scientists and ordinary laborers risked their lives to develop and build the country's nuclear arsenal.

Playing with fire*

Part 1: A deceptive campaign by industry brought toxic flame retardants into our homes and into our bodies.

Part 2: How big tobacco and its inside man steered a group of fire officials to push flame retardant furniture.

Part 3: The chemical industry distorts science to promote flame retardants, downplay the health risks.

Part 4: Flame retardants get a pass from regulators with little assessment of potential health risks

Part 5: Testing for Tribune finds flame retardants linked to cancer in some popular baby mattresses

Part 6: On the defensive, the chemical industry turns to the questionable conclusions of a friendly scientist

Impact and reaction

*Pulitzer Prize finalist for Investigative Reporting, 2013