614 mph, why so slow? :)
The first human ever to reach that height was launched virtually from my backyard.
The reason this location was selected was because it was a mining pit drained of all it's water. Today it's the deepest lake in Minnesota and great for catching trout.
[img width=288 height=245]http://i7.photobucket.com/albums/y274/jamieanderson/portsmouth20sintering20plant1.jpg[/img]
[img width=343 height=477]http://i7.photobucket.com/albums/y274/jamieanderson/ball03.jpg[/img]