CAS E S T UDY I NTRODUCT I ON Donna , T e x a s , i s a t i ny , qui et c ommuni t y a f ew mi l es f r om t he bor der wi t h Me x i c o. T he Donna I ndependent S c hool Di s t r i c t ( I S D) oper a t es mor e t ha n 20 K- 12 s c hool s , s pr ea d ov er a wi de s wa t h of r ur a l t er r i t or y a t t he s out her nmos t t i p of t he L one S t a r S t a t e . L i f e ha s a t i mel es s f eel her e a nd i t ' s ea s y t o s l i p ba c k i nt o t he f or got t en r hy t hms of a s i mpl er a ge . Y Y et Donna i s j us t a da y ' s dr i v e f r om Hous t on' s NAS A S pa c e Cent er , wher e t ec hni c i a ns l a unc h i nt er pl a net a r y mi s s i ons t ha t depend on na nodev i c es a nd e x

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