Daniel Zwerdling Daniel Zwerdling is a correspondent in NPR's Investigations Unit.
Answers Sought in Deadly Kentucky Mine Explosion
Who Pays to Repair Louisiana's Wetlands?
New Federal Mine Safety Rules Criticized
Spate of Miner Deaths Alarms Lawmakers
Disturbing Safety Violations Seen at Sago Mine
Critics: Corps Can't Fix Levees By Hurricane Season
Bush Seeks to Double Funds for Levee Repairs
Lawmakers Seek Probe into Alien Detainee's Death
The Death of Richard Rust
Ramsey Clark for the Defense
Conference Calls Detail Katrina Concerns, Failings
Katrina: What Went Wrong?
Katrina Timeline: Misdirected Aid
Katrina Timeline: Unexecuted Plans
Katrina to Challenge City's Floodwater Infrastructure