I was visiting with a friend in the desert when Virgin Galactic made it's initial flight into space. I don't know how high they were when they passed overhead,

I was visiting with a friend in the desert when Virgin Galactic made it's initial flight into space. I don't know how high they were when they passed overhead, but it certainly audible and rattled the garage door. Edit: after a quick search, the VSS Unity is released from the carrier at 50k feet. But now I can't recall if the boom was on the ascent or on the way back.