May Day, New York, 1948. Photo by Dan Weiner (1919-1959), gelatin silver print, from the Metropolitan Museum of Art.

May Day, New York, 1948. Photo by Dan Weiner (1919-1959), gelatin silver print, from the Metropolitan Museum of Art.

Harlem, New York, 1964. A policeman confronts a group at Seventh Ave. and 126th St. during a riot. Photo by Dick De Marsico.
(Library of Congress)

Harlem, New York, 1964. A policeman confronts a group at Seventh Ave. and 126th St. during a riot. Photo by Dick De Marsico.

(Library of Congress)

Policewoman May Gregory, department unknown, circa 1910-1915.
(Police Heritage Museum)

Policewoman May Gregory, department unknown, circa 1910-1915.

(Police Heritage Museum)

Los Angeles, 1929. The children of LAPD Chief James E. Davis pose with Lobo the police dog.
(Los Angeles Public Library)

Los Angeles, 1929. The children of LAPD Chief James E. Davis pose with Lobo the police dog.

(Los Angeles Public Library)

Boston Police survey the destruction on Boylston Street near the finish line of the Boston Marathon. Photo by John Tlumacki/The Boston Globe.

Boston Police survey the destruction on Boylston Street near the finish line of the Boston Marathon. Photo by John Tlumacki/The Boston Globe.

Boston police swarm around fallen runner Bill Iffrig right after the bomb detonation during the Boston Marathon. Photo by John Tlumacki.

Boston police swarm around fallen runner Bill Iffrig right after the bomb detonation during the Boston Marathon. Photo by John Tlumacki.

Ellison “Tarzan” Brown wins the 1939 Boston Marathon.
(Boston Public Library)

Ellison “Tarzan” Brown wins the 1939 Boston Marathon.

(Boston Public Library)

Maryland State Police radar speed trap. Officer stands next to a black Plymouth.
(Duke University Library)

Maryland State Police radar speed trap. Officer stands next to a black Plymouth.

(Duke University Library)

todayinlaborhistory:

Today in labor history, April 11, 1986: Police fire tear gas into a group of 400 striking P-9 workers and supporters who are blockading the entrances to the Hormel plant; 17 people are arrested on felony riot charges. The following day, thousands rallied in Austin, Minnesota, in support of the strike.

todayinlaborhistory:

Today in labor history, April 11, 1986: Police fire tear gas into a group of 400 striking P-9 workers and supporters who are blockading the entrances to the Hormel plant; 17 people are arrested on felony riot charges. The following day, thousands rallied in Austin, Minnesota, in support of the strike.

Police patrol the beaches of Cancun, Mexico, March 6, 2005.
(NBC News)

Police patrol the beaches of Cancun, Mexico, March 6, 2005.

(NBC News)

The sinners of Spring Breakers, 2013, directed by Harmony Korine.

The sinners of Spring Breakers, 2013, directed by Harmony Korine.

Humphrey Bogart in Black Legion (1937)
(cinema.de)

Humphrey Bogart in Black Legion (1937)

(cinema.de)

Sean Penn and Robert Duvall in press kit pic for Colors, 1988, directed by Dennis Hopper.

Sean Penn and Robert Duvall in press kit pic for Colors, 1988, directed by Dennis Hopper.