The most complex flying machine...

built by humans sits ready to go on launch pad 39A at Kennedy Space Center, and we were able to get within 0.8 miles this afternoon for one last glimpse before it roars skyward on Friday (click images to enlarge):

Here's a closeup telephoto shot from the north, with space shuttle Endeavour hidden behind the twin solid rocket boosters and external liquid fuel tank:

The countdown is proceeding smoothly despite some hail and lightening near the pad early this evening.  Liftoff is still scheduled for 3:47 pm EDT tomorrow.