Protesters Descend on Philadelphia Ahead of DNC

Activists including hundreds of environmentalists and Bernie Sanders supporters march through downtown before the start of the Democratic National Convention (DNC) on July 24, 2016 in Philadelphia. The convention officially begins today and is expected to attract thousands of protesters, members of the media and Democratic delegates to the City of Brotherly Love.

A supporter of former Democratic presidential candidate Bernie Sanders holds a cardboard cutout of him.

Protesters supporting various causes, including Vermont Senator Sanders and environmental action, march through the city center.

A Black Lives Matters movement supporter walks through downtown.

A protester with political buttons supporting various causes marches through the city center.

Activists supporting clean energy rally.

People march in support of clean energy and the environment.

Protesters supporting Bernie Sanders prepare for a demonstration in front of City Hall.

Activists including hundreds of environmentalists and Bernie Sanders supporters march through downtown.

Police block traffic as protesters march in the street.