Protester Ieshia Evans is detained by law enforcement officers near the police headquarters in Baton Rouge, Louisiana, on Saturday, July 9. Evans was among dozens of people protesting the death of Alton Sterling, who was fatally shot by police just a few days earlier. Click through the gallery to see memorable images from other protests throughout history.
On March 12, 1930, Indian nationalist leader Mahatma Gandhi led a nonviolent protest against the British Empire. The march protested the British tax on salt, a necessity of everyday life. Gandhi called for Indians to illegally make salt or buy it illegally. More nonviolent protests against the tax were mounted in large cities across India, and Gandhi's methods eventually led to India's independence.
Rosa Parks became an inspiration for the modern civil rights movement when she was arrested in Montgomery, Alabama, on December 1, 1955, after refusing to give up her seat to a white passenger on a city bus. For 381 days, African-Americans boycotted public transportation to protest Parks' arrest and, in turn, segregation laws. The boycott led to a 1956 Supreme Court ruling desegregating public transportation in Montgomery. Soon after, Parks was photographed near the front of a bus in what became an enduring image of the civil rights movement.
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A 17-year-old civil rights demonstrator, defying an anti-parade ordinance in Birmingham, Alabama, is attacked by a police dog on May 3, 1963.
The Rev. Martin Luther King Jr. waves to supporters on the Mall in Washington during the March on Washington on August 28, 1963.
Jan Rose Kasmir stands in front of National Guard members outside the Pentagon during an anti-Vietnam War march on October 21, 1967.
Marc Riboud/Magnum Photos
Students in Paris hurl projectiles at the police on Boulevard Saint-Germain during the uprisings of May 6, 1968.
Bruno Barbey/Magnum Photos
Black Panther members protest in Chicago in 1968.
Hiroji Kubota/Magnum Photos
A pacifist demonstrates in Santa Monica, California, on June 15, 1968.
Dennis Stock/Magnum Photos
Tommie Smith and John Carlos, gold and bronze medalists in the 200-meter run at the 1968 Olympic Games, raise their fists in the Black Power salute on October 16, 1968, in Mexico City.
John Lennon and Yoko Ono give a press conference during their "bed-in" for peace at an Amsterdam hotel in March 1969.
Mary Ann Vecchio kneels over the body of student Jeffrey Miller during an anti-war demonstration at Kent State University in Ohio on May 4, 1970.
John Filo/Getty Images/FILE
Young Chinese demonstrators protest official corruption and urge democracy in Beijing's Tiananmen Square in 1989.
Stuart Franklin/Magnum Photos
A man in Tiananmen Square stands in front of a column of T-59 tanks on June 4, 1989.
Stuart Franklin/Magnum Photos
Police Lt. John Pike at the University of California, Davis, uses pepper spray to break up Occupy UC Davis protesters on the school's quad on November 18, 2011. This image sparked controversy amid the Occupy protests and fueled the flames for protesters. A judge ruled that the university must pay Pike $38,000 in workers' compensation for the depression and anxiety he suffered as a result of the backlash from the incident.
Wayne Tilcock/The Enterprise/AP/File
Egyptian army soldiers arrest a female protester during clashes at Tahrir Square in Cairo on December 17, 2011. On January 25, people took to the streets in demonstrations against corruption and failing economic policies. From the beginning, the revolution in Egypt was propelled by the use of social media. The events in Egypt served as a flash point for journalists on the ground, too. For perhaps one of the first times, history itself has been recorded instantaneously, as reporters took to Twitter to share 140-character updates and personal stories from the protests.
A riot police officer uses tear gas as people protest the destruction of a park for a pedestrian project in Istanbul's Taksim Square on May 28, 2013. The woman in red became the face of the protests.
Protesters in Kiev, Ukraine, catch fire as they stand behind burning barricades during clashes with police on February 20, 2014. Kiev's Independence Square had been the center of anti-government protests since November 2013, when President Viktor Yanukovych reversed a decision on a trade deal with the European Union and instead turned toward Russia.
Bulent Kilic/AFP/Getty Images
Riot police use pepper spray as they clash with pro-democracy protesters outside the government headquarters in Hong Kong on September 28, 2014. Demonstrations began in response to China's decision to allow only Beijing-vetted candidates to stand in the city's 2017 election for chief executive. Protesters say Beijing has gone back on its pledge to allow universal suffrage in Hong Kong, which was promised "a high degree of autonomy" when it was handed back to China by Britain in 1997. The umbrella has become the defining image of the protest movement, used to shield protesters from tear gas and the elements.
A protester in Ferguson, Missouri, stands in front of police vehicles with his hands up on November 24, 2014. A grand jury's decision not to indict police Officer Darren Wilson in the killing of Michael Brown prompted waves of protests in Ferguson and across the country. The "hands up, don't shoot" gesture became a rallying cry and protest symbol.
Justin Sullivan/Getty Images
A man attempts to calm a fellow demonstrator as they face police in Baltimore in April 2015. Riots broke out after the funeral for Freddie Gray, who died of a severe spinal cord injury while in police custody. His death sparked protests in Baltimore and raised long-simmering tensions between police and residents.
Chip Somodevilla/Getty Images
Tess Apslund, 42, stands with a raised fist in front of uniformed neo-Nazis during a Nordic Resistance Movement demonstration in Borlange, Sweden, on Sunday, May 1.
David Lagerlof /TT News Agency/Press Association Images