On Wed, 1 Aug 2001, Sally Manton wrote:
Wasn't there a space mission that went up in a million-dollar explosion because someone typed a minus instead of a plus sign?
Yup. Phobos 1, a Soviet Mars mission. (Though I doubt the cost was anything like as low as a million dollars.)
There's a brief discussion of various such cases at
http://web.tampabay.rr.com/dneufeld/sftrel.html
Iain