The NationalDeepwater Horizon oil spill, five years laterApr 15, 2015 | 10:28It's been nearly five years since the Deepwater Horizon oil spill. More than three million barrels of oil gushed into the Gulf of Mexico. Paul Hunter takes us back to Louisiana.
The NationalPhotographer Camille Seaman captures an icy landscape that's melting awayMar 2, 2015 | 10:58Camille Seaman is a photographer with a passion for ice. She's working in Alaska, raising the alarm about a landscape that's melting away.
The NationalRex Murphy: Keystone XL PipelineFeb 26, 2015 | 3:10Point of View: Rex discusses Barack Obama's decision to veto a bill that would have approved construction of the Keystone XL oil pipeline.
The NationalIs fracking causing Texas earthquakes?Jan 23, 2015 | 3:39Minor earthquakes are becoming a common occurrence in parts of Texas. Some blame the increase in fracking, the process of extracting natural gas from shale rock.