Katherine Zimmerman
Resident Fellow, American Enterprise Institute
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![Protestors chant as they ride on an army tank transporter in Tahrir Square on January 29, 2011 in Cairo, Egypt (Photo by Peter Macdiarmid/Getty Images)](/sites/default/files/styles/16_9_sm/public/researches/thumb/16806/feature_getty_images_108516749.jpg?h=ae002e9f&itok=CYe7KflT)
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Protestors chant as they ride on an army tank transporter in Tahrir Square on January 29, 2011 in Cairo, Egypt (Photo by Peter Macdiarmid/Getty Images)