National Public Radio: It's not everyday that a world famous climate scientist gets himself arrested in front of the White House. But that's exactly what happened to James Hansen in 2011 as part of a protest against the Keystone Pipeline.
In the 1980s it was Hansen's highly respected work that helped people realize that the climate change we humans were driving was real - and really dangerous.
For lots of folks, Hansen's movement from climate scientist to climate activist made him a hero. But to others, particularly...