Topic: Tucson
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Why are Michele Bachmann and Mitt Romney campaigning early in Arizona?
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Latin America Monitor
Drug tunnel found in Arizona, but it's no fancy, million-dollar underground corridor
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Climate change: Species climbing higher and migrating north, study says
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Scientists find 'best evidence' yet for liquid water now on Mars
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Gabrielle Giffords returns to Capitol Hill, but political future still uncertain
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In Pictures
Gabrielle Giffords, political survivor
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Gabrielle Giffords appears for debt deal vote (VIDEO)
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Now, Arizona wants donations to build its own fence on Mexico border
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In Pictures
Coming back to Earth
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Phoenix dust storm plays havoc with local power and transportation (VIDEO)
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Latin America Monitor
US-Mexico border: new tourist attraction?
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A sun with no sun spots? What that could mean for Earth and its climate.
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Giffords photo casts Arizona Rep. back in spotlight but who will take her place?
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Gabrielle Giffords photos inspire friends and strangers alike
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Space shuttle Endeavour on terra firma, ending 19 years as orbiter
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Jared Loughner erupts in court before judge declares him unfit to stand trial
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Jared Loughner: How to tell if shooting suspect is fit to stand trial?
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First tea party, now tequila party – a Latino effort to get out the vote
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Why Obama rejected John Glenn's plea to save the space shuttle progam
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Endeavour flight: the NASA shuttle launch that disappeared
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Change Agent
Giving Pledge: A big-hearted billionaires club, led by Bill Gates and Warren Buffett, keeps growing
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Huge asteroid to buzz Earth in November
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In Pictures
Space photos of the day: Looking deeper
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New Endeavour liftoff date: no earlier than May 16
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Tucson district in turmoil over state ban on ethnic studies