Aaron Moselle reports on how the city is helping homeless people before the DNC. Anne Hoffman looks at a new exercise program that is helping patients with their Parkinson’s symptoms. Bobby Allyn reports on new guidelines that officials hope will lead to fewer people being stopped and frisked. Margaret J. Krauss looks at how we access government data. Avory Brookins reports on how a group in Germantown is teaching Black History. Also, a report on a creative way to network.