Courtesy of this reminder by Brian at Outdoor Type, I just watched the International Space Station and Space Shuttle streak across the sky.  Awe inspiring.  Depending on where you live, you may still have another couple of chances to see it.  If you live in or around DC, see this link.  If you live elsewhere, drop your city into the “Sighting Opportunities” query engine at NASA and cross your fingers.  So very very cool.