Police confront protesters demonstrating over the death of Freddie Gray, near Union Square in New York. Photograph: Michael Appleton/The New York Times 1:19

Protests are continuing in the US over the death of Freddie Gray, whose death from injuries sustained while in police custody has led to violence in (...)

James Connolly addressing the masses in Union Square on May Day in 1908. It is the only published photograph of the labour activist during his time in the US and one of the only occasions he was ever photographed speaking. Photograph: Library of Congress

“Tomorrow is Labor Day,” proclaimed the ad in the Chicago Daily Tribune of September 5th, 1909. “With the last picnic event of the Socialist Party, wi(...)

Trayvon Martin supporters stand in front of an American flag in Times Square after marching from a rally for Martin in Union Square in Manhattan. Photograph: Mario Tama/Getty Images

An impromptu march through the streets of Manhattan calling for justice for Trayvon Martin continued into the early hours of this morning under heavy (...)