To Hyra, it has caused not just residential displacement for African Americans but also political and cultural displacementHe saw major issues of gentr皇冠手机端的网址ification and segregation in Washington beneath the surface of rapid urban renewalThese changes may look pleasant, but not quite so to Derek Hyra, an associate professor at the American University School of Public Affairs and an expert on neighborhood changeThe 14th Street near U Street, a traditional African American neighborhood, is now lined up with hip restaurants and bars in this photo taken on SundayWhites are the 皇冠手机端的网址majority now, accounting for 55 percent of the communityThe same urban renewal is happening in other parts of Washington