Denver May Day Protest (1)

Young IWW member checks his cell phone at a May Day rally in Denver, Co.

Denver May Day Protest (4)

Part of the crowd at the May Day rally in Denver, Co.

Denver May Day Protest (5)

Protesters clad in black, with their faces covered were among the crowd at a May Day rally in Denver including this woman in a witch costume.

Denver May Day Protest (7)

Protesters clad in black, with their faces covered were among the crowd at a May Day rally in Denver. Some displayed the flag of the Soviet Union.

Denver May Day Protest (12)

Young man addressing the crowd at a May Day rally in Denver.

Denver May Day Protest (8)

Young man addressing the crowd at a May Day rally in Denver.

Denver May Day Protest (13)

Denver May Day demonstrator displays a "Denver Socialists" banner.

Denver May Day Protest (14)

Part of the crowd at the May Day rally in Denver, Co.

Denver May Day Protest (15)

Part of the crowd at the May Day rally in Denver, Co.

Denver May Day Protest (17)

Denver Socialist banner on the ground before a May Day rally in Denver, Co.

Denver May Day Protest (16)

Part of the crowd at the May Day rally in Denver, Co.