more. logon to cnn.com/impact to find out more how you can help. protesters fill the streets of major u.s. cities for a third night demanding police reform and accountability. some of the biggest protests were in chicago where people marched through the upscale shopping district along lakeshore drive. they ended up outside the city's police headquarters. a number of people were arrested. in washington, demonstrators blocked traffic for hours in chinatown. they would lie down in the middle of the street in what they called a die-in. crowds shut down a major interstate highway in miami also. it was a rainey night in new york. that kept many protesters at home. chris welsh was out on the streets with the demonstrators and talked with us earlier from the east side of manhattan. >> tonight was a very different night than the last two nights, a much calmer night. you can see around me right now, it's very clearly raining.