On Thu, 28 Jul 2011 13:48:23 -0400, Jeff Findley
wrote:

With Dragon, there is no crew on board to control the rendezvous.
Automated rendezvous of this type isn't trivial. Remember the
Progress/Mir collision? I'm sure no one wants a repeat of that accident
with ISS.

The Progress/Mir collision was while Progress was being remotely
piloted from Mir, not automated.

But agreed, this isn't trivial and success here will be huge.

Brian