Hundreds march after mayor's apology

Hundreds of protesters marched through the streets of Chicago and staged "die-ins" on Thursday, calling for the resignation of embattled Mayor Rahm Emanuel a day after he emotionally apologized for the 2014 police shooting of a black teenager.

The day's protests started with dozens of medical students of different races lying down in front of City Hall for 16 minutes at the start of the workday, some holding signs reading "Do no harm" in a demonstration broadcast by local media.

The protesters chose 16 minutes to symbolize the 16 times white police officer Jason Van Dyke shot 17-year-old Laquan McDonald in 2014.