Alba Nava uses an aspirator to gather virus-carrying whiteflies that have been feeding on tomato plants at the University of Florida.
Dan Charles/NPR
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The Pentagon wants university researchers to find ways to protect crops in the field using infectious viruses carried by insects. Critics think it looks like bioweapons research.
Alba Nava uses an aspirator to gather virus-carrying whiteflies that have been feeding on tomato plants at the University of Florida.
Dan Charles/NPR
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Pope Francis greets the crowd in the Vatican's St. Peter's Square in October. Many of the pope's most vocal opponents are in the United States, attacking him in tweets, blogs and politically conservative media.
Alberto Pizzoli/AFP/Getty Images
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