On this 50th anniversary of the Philadelphia race riots, we continue our week's retrospective with David Bartelt, a Temple University professor of geography and urban studies.

Professor Bartelt talks with NewsWorks Tonight host, Dave Heller, about his perspective, now as a professor and as a Temple student in 1964.

Bartelt remembers the decline he could see in North Philadelphia.

Click through the photo gallery to see the "Then and Now" photos, and listen to the audio using the player above.