Alarming candor from Elon Musk

In what sense could this be alarming?

"We have to do something dramatic to reduce the cost of getting to space," said Mr. Musk in an interview in his cubicle at SpaceX's offices here. "If we can get the cost low, we can extend life to another planet.

"I want to help make humanity a space-faring civilization," he said with disarming — or alarming — candor.

No .. really .. how is that alarming?