A maverick in flight

摘要

"Space travel is the only technology that is more dangerous and more expensive now than it was in its first year," says Burt Rutan, an aerospace engineer and advocate of private spaceflight. "Fifty years after Yuri Gagarin, the space shuttle ended up being more dangerous and more expensive to fly than those first throw-away rockets, even though large portions of it were reusable. It's absurd."