Robert Langer: To me, when people leave the lab, the way I think about it is that there’s a couple of sets of skills.  One is how to take a problem from the beginning to end.  And it’s often a long road, but how you take a problem from beginning to end, from framing the questions to coming up with the answers.  But also, I hope that when they’re there, they think about big questions. That they want to leave there and not do things that are incremental, but are things that are really big, and maybe can have a huge impact on the world.  And then, I also hope that they’ve grown as a person, that they realize that they’ve learned how to work with individuals better, they’ve learned how to deal with scientific frustration better.  That they’ve learned how to communicate better, both in writing and in speaking.  So all of that.