After 50 years of racial strife: Why is Greensboro still so tense?

...The 2010 census showed the South is becoming more diverse, and that descendents of African-Americans who migrated North decades ago are now heading South. For the first time, Greensboro's minorities outnumber white residents, 51.6% to 48.4%, census data showed. The city's African American population increased by nearly 31% in the past decade.

It's a subtle shift, but even after so much progress, it matters. Residents said it could change the political and economic power structure that has long been in place in cities like Greensboro. 

Decades ago, this city was a catalyst in the civil rights movement. Downtown, there's a civil rights museum around the famous Woolworth's lunch counter where four young African-American men staged their historic sit-in protest a half-century ago. It's all miles away from the infamous street where a confrontation between the Ku Klux Klan and communists turned deadly in 1979.

Despite a changing population and opportunities to learn from its history, racial tensions haven't disappeared in Greensboro, longtime residents say. On the street, residents of Greensboro acknowledge a geographic racial divide between the minority-heavy east side and the mostly white west side....