Mothers protest against racial inequality and police violence in Portland, Oregon, U.S., July 22, 2020. (Photo : REUTERS/Caitlin Ochs )
Federal law enforcement officers are seen during a demonstration against the presence of federal law enforcement officers and racial inequality in Portland, Oregon, U.S., July 22, 2020. (Photo : REUTERS/Caitlin Ochs)
Federal law enforcement officers are seen during a demonstration against the presence of federal law enforcement officers and racial inequality in Portland, Oregon, U.S., July 21, 2020. (Photo : REUTERS/Caitlin Ochs)
Federal law enforcement officers, deployed under the Trump administration's new executive order to protect federal monuments and buildings, face off with protesters against racial inequality and police violence in Portland, Oregon, U.S., July 21, 2020. (Photo : REUTERS/Caitlin Ochs )
Federal law enforcement officers detain a protester during a demonstration against the presence of federal law enforcement officers and racial inequality in Portland, Oregon, U.S., July 21, 2020. (Photo : REUTERS/Caitlin Ochs)
Federal law enforcement officers are seen during a demonstration against the presence of federal law enforcement officers and racial inequality in Portland, Oregon, U.S., July 22, 2020. (Photo : REUTERS/Caitlin Ochs)
A federal law enforcement officer stands behind a metal fence as demonstrators gather during a protest against racial inequality and police violence in Portland, Oregon, U.S., July 24, 2020. (Photo : REUTERS/Caitlin Ochs)
Federal law enforcement officers face off with protesters during a demonstration against police violence, the presence of federal officers, and racial inequality in Portland, Oregon, U.S., July 24, 2020. Picture taken July 24, 2020. (Photo : REUTERS/Caitlin Ochs)
A federal law enforcement officer pushes a person back during a demonstration against the presence of federal law enforcement officers and racial inequality in Portland, Oregon, U.S., July 21, 2020. Picture taken July 21, 2020. (Photo : REUTERS/Caitlin Ochs)
Federal law enforcement officers fire at protesters and form a line on a public street during a demonstration against police violence and racial inequality in Portland, Oregon, U.S., July 24, 2020. (Photo : REUTERS/Caitlin Ochs)
Federal law enforcement officers gather as demonstrators protest against racial inequality and police violence in Portland, Oregon, U.S., July 26, 2020. (Photo : REUTERS/Caitlin Ochs)
Federal law enforcement officers detain a demonstrator during a protest against racial inequality and police violence in Portland, Oregon, U.S., July 25, 2020. (Photo : REUTERS/Caitlin Ochs)
A woman receives medical attention after being injured during a demonstration against the presence of federal law enforcement officers and racial inequality in Portland, Oregon, U.S., July 21, 2020. (Photo : REUTERS/Caitlin Ochs)
Demonstrators gather behind a fence during a protest against racial inequality and police violence in Portland, Oregon, U.S., July 25, 2020. (Photo : REUTERS/Caitlin Ochs)
A protestor reacts during a demonstration against the presence of federal law enforcement officers and racial inequality in Portland, Oregon, U.S., July 21, 2020. (Photo : REUTERS/Caitlin Ochs)
Demonstrators shelter from tear gas behind umbrellas during a protest against racial inequality and police violence in Portland, Oregon, U.S., July 22, 2020. Picture taken July 22, 2020. (Photo : REUTERS/Caitlin Ochs )
A federal law enforcement officer is covered in red paint during a protest against racial inequality and police violence in Portland, Oregon, U.S., July 26, 2020. (Photo : REUTERS/Caitlin Ochs )
Federal law enforcement officers gather as demonstrators protest against racial inequality and police violence in Portland, Oregon, U.S., July 26, 2020. (Photo : REUTERS/Caitlin Ochs)
A photographer walks behind federal law enforcement officers as demonstrators protest against racial inequality and police violence in Portland, Oregon, U.S., July 26, 2020. (Photo : REUTERS/Caitlin Ochs)
Demonstrator Dana Parks reacts as she is detained by a police officer during a protest against racial inequality and police violence in Portland, Oregon, U.S., July 26, 2020. (Photo : REUTERS/Caitlin Ochs )
Demonstrator Dana Parks reacts as she is detained by a police officer during a protest against racial inequality and police violence in Portland, Oregon, U.S., July 26, 2020. (Photo : REUTERS/Caitlin Ochs )
A demonstrator kneels down while putting his hands behind his head as he is approached by a federal law enforcement officer during a protest against racial inequality and police violence in Portland, Oregon, U.S., July 25, 2020. (Photo : REUTERS/Caitlin Ochs)
A demonstrator is detained by a police officer during a protest against racial inequality and police violence in Portland, Oregon, U.S., July 26, 2020. (Photo : REUTERS/Caitlin Ochs )
A man receives medical aid as demonstrators protest against racial inequality and police violence in Portland, Oregon, U.S., July 25, 2020. (Photo : REUTERS/Caitlin Ochs)
Mothers dressed in yellow take part in a demonstration against the presence of federal law enforcement officers and racial inequality in Portland, Oregon, U.S., July 21, 2020. (Photo : REUTERS/Caitlin Ochs)
Demonstrators hold lit mobile phones during a protest against the presence of federal law enforcement officers and racial inequality in Portland, Oregon, U.S., July 21, 2020. (Photo : REUTERS/Caitlin Ochs )