About the Trailing Edge of Spaceship One

Why is the trailing edge of Spaceship One flat??
One friend of mine told me that it might be because it creates drag during descent, but it'll create drag during climb also...
Anyone know why???

Nothing happened today.
No operations, no interviews, nothing.
But I had a lot of stuffs to take care of, so it was good that nothing happened today.

I should've sent my resume's yesterday, cuz today is Friday, and everyone won't see my resume till Monday.

Worked on cover letter writing.

Wiped the bugs off the tow plane.

Wrote summaries of the flights from past two days.

Researched the potential companies.