案例简介：1963 3月在华盛顿举行的 “就业与自由” 活动吸引了250,000名参与者，其中包括75,000名白人参加者。今天，国家非裔美国人历史和文化博物馆 @ nmaahc将接管 @ NatGeo，在1963 3月在华盛顿举行的 “就业与自由” 活动中分享博物馆收藏的稀有和标志性图像。当美国人本周来到华盛顿特区纪念这一分水岭时刻时，这些图像反映了美国历史上的关键日子。史密森尼国家非裔美国人历史和文化博物馆收藏的Aaron Stanley Tretick的照片，凯蒂·凯利的礼物和斯坦利·特里蒂克的遗产。

案例简介：1963 March on Washington for Jobs and Freedom drew 250,000 participants, including 75,000 white attendeesToday the National Museum of African American History and Culture @nmaahc is taking over @NatGeo to share rare and iconic images from the museum's collection on the 1963 March on Washington for Jobs and Freedom. As Americans descend on Washington, D.C., this week to commemorate this watershed moment, these images reflect that key day in American history.Photo by Aaron Stanley Tretick, from the collection of the Smithsonian National Museum of African American History and Culture, a gift of Kitty Kelley and the estate of Stanley Tretick.

国家地理 - 1963 March on Washington for Jobs and Freedom drew 250,000 participants, including 75,000 white attendeesToday the Nation

案例简介：1963 3月在华盛顿举行的 “就业与自由” 活动吸引了250,000名参与者，其中包括75,000名白人参加者。今天，国家非裔美国人历史和文化博物馆 @ nmaahc将接管 @ NatGeo，在1963 3月在华盛顿举行的 “就业与自由” 活动中分享博物馆收藏的稀有和标志性图像。当美国人本周来到华盛顿特区纪念这一分水岭时刻时，这些图像反映了美国历史上的关键日子。史密森尼国家非裔美国人历史和文化博物馆收藏的Aaron Stanley Tretick的照片，凯蒂·凯利的礼物和斯坦利·特里蒂克的遗产。

国家地理 - 1963 March on Washington for Jobs and Freedom drew 250,000 participants, including 75,000 white attendeesToday the Nation

案例简介：1963 March on Washington for Jobs and Freedom drew 250,000 participants, including 75,000 white attendeesToday the National Museum of African American History and Culture @nmaahc is taking over @NatGeo to share rare and iconic images from the museum's collection on the 1963 March on Washington for Jobs and Freedom. As Americans descend on Washington, D.C., this week to commemorate this watershed moment, these images reflect that key day in American history.Photo by Aaron Stanley Tretick, from the collection of the Smithsonian National Museum of African American History and Culture, a gift of Kitty Kelley and the estate of Stanley Tretick.

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国家地理 - 1963 March on Washington for Jobs and Freedom drew 250,000 participants, including 75,000 white attendeesToday the Nation

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