NBC Evening News for Tuesday, Sep 17, 1991
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(Studio: Tom Brokaw) Space shuttle Discovery's environmental mission mentioned. Report introduced.
(No location given: Roger O'Neil) Premature browning of saguaro cactus in Arizona deserts featured; scenes shown. [Park ranger Travis WHITE - says the cacti are a symbol of the Southwest.] Ozone layer depletion theory of cactus browning mentioned. [Saguaro National Monument superintendent Bill PALECK - says the plants are survivors.]
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