Us on the beach!
STS-132: Atlantis Blasts Off!!!
Booster Separation at about 30 miles up (about 160,000 feet!)
Pay no mind to the tree that got in my way...
Here's a really tight crop where you can actually see the boosters separating
And here's a very short clip taken with our camcorder. It's really difficult to track a space shuttle and 3 kids at the same time!