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Smoke is seen rising from a neighborhood in Khartoum, Sudan, Saturday, April 15, 2023. Fierce clashes between Sudan's military and the country's powerful paramilitary erupted in the capital and elsewhere in the African nation after weeks of escalating tensions between the two forces. The fighting raised fears of a wider conflict in the chaos-stricken nation. (AP Photo/Marwan Ali)

U.S. Department of State

The Lessons of 1989: Freedom and Our Future