"WASHINGTON -- The Obama administration’s nominee to lead the Environmental Protection Agency declined on Thursday to answer questions about a controversial new guide that suggests public health standards could be relaxed dramatically in the event of a nuclear attack or accident."

The 2013 Pulitzer Prize for National Reporting went to InsideClimate News, a 5-year-old web-only nonprofit, for its book-length feature series on the 2010 Enbridge tar-sands oil spill that fouled miles of Michigan's Kalamazoo River. InsideClimate has been one of the most aggressive media outlets covering the current spill in Mayflower, Arkansas. ExxonMobil recently threatened one of InsideClimate's reporters with arrest for trying to find a federal government press office handling the spill.

"Decades ago, when a U.S. EPA administrator was on the brink of retirement, employees wheeled a giant cardboard box into his office. Inside: an employee known for his tendency to disparage the agency's decisions in the press."

The livestock industry, which has been successfully urging state legislatures to pass bills hamstringing exposes of animal cruelty, has a new tactic that hobbles long-term undercover investigations of feedlots and slaughterhouses.