Mansour al-Omari, a Syrian human-rights activist documenting cases of people who have disappeared under President Bashar Assad's government, talks about how he smuggled scraps of fabric with the names of fellow inmates out of Syria that he is presenting to the U.S. Holocaust Memorial Museum for preservation at the conservation center, Tuesday, Aug. 8, 2017, in Bowie, Md. (AP Photo/Susan Walsh)
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