
A Pennsylvania National Guardsman stands watch on the West End Bridge early Thursday morning.

Supporters of a free Tibet march through Oakland.

A demonstrator for a free Tibet marches through Oakland.

Protesters avoid the pepper gas fired by police in Lawrenceville during their march.

A U.S. Coast Guard boat heads up the Monongahela River beneath the Smithfield Street Bridge Thursday morning.

Supporters for a free Tibet hold signs as they march through Oakland.

Police stand in a smoke cloud from a smoke bomb after a clash with protesters along Baum Boulevard during a march by demonstrators on Thursday.

Police arrest a protester near Baum Boulevard during a march by demonstrators on Thursday.

Police arrest a protester near Baum Boulevard.

Supporters of a free Tibet march along Forbes Avenue in Oakland on Thursday.

Police stand watch along Liberty Avenue near the Iron City Brewery near Lawrenceville during a march by demonstrators on Thursday.

Protesters push a dumpster at police down Liberty Avenue in Lawrenceville.

A protester with his face concealed stands in the crowded streets of Lawrenceville during a protest march on Thursday.

A protester runs through gas after police fired several canisters at the protesters in Lawrenceville.

A protester dressed as a cow taunts police in Lawrenceville.

Adele Meyer, 20, of Bloomfield skips in front of Police officers along Liberty Avenue as they move towards a large group of protesters.

A protester cheers as he marches through Bloomfield on Thursday.

Police take a defensive posture as they fire tear gas and shoot beanbag bullets at protesters along Baum Boulevard.

Police line up to fire non-lethal ammunition at protesters along Baum Boulevard during a march on Thursday.

Police form a blockade as they confront a protester along Baum Boulevard.

Police watch as protesters run off from Baum Boulevard during a march by demonstrators on Thursday.

Police form a blockade as they head to confront protesters along Baum Boulevard.

A large group of police stand across Baum Boulevard after a protest march turned violent on Thursday. Protesters threw rocks at police and broke several windows along their march from Lawrenceville.
These are a few of my images from my coverage of the G20 Summit in Pittsburgh on Thursday, September 24, 2009.