 Nyorai kupfuurira kweiyi ndima - James Fletcher akatarisira kuronga kwokutanga kwepurogiramu yeSpace Shuttle mukati mokutonga kwake kwokutanga somutarisiri pasi paPurezidhendi Nixon. Akagadzwa kwenguva yechipiri semutungamiriri kubva muna Chivabvu 1986 kusvika Kubvumbi 1989 neMutungamiri Ronald Reagan kubatsira sangano kupora kubva munjodzi ye Space Shuttle Challenger. 