
In 1962, one missing overbar in an Atlas guidance equation helped send Mariner 1 off course, forcing range safety to destroy NASA’s $18.5 million Venus mission less than five minutes after launch
On July 22, 1962, a missing overbar in a guidance formula, combined with a radar hardware failure, sent NASA's first interplanetary probe off course and forced Range Safety to destroy Mariner 1 just 293 seconds after launch.







