U.S. Defense Secretary Mark Esper visits DC National Guard military officers guarding the White House amid nationwide unrest following the death in Minneapolis police custody of George Floyd, in Washington, U.S., June 1, 2020.

DC National Guard Military Police officers and law enforcement officers stand guard during a protests against the death in Minneapolis custody of George Floyd, near the White House in Washington, D.C., U.S., June 1, 2020.

National Guard's members are seen in front of the Dolby Theatre along Hollywood Boulevard during a rally against George Floyd death in Minneapolis police custody, in Los Angeles, California, U.S., June 2, 2020.

National Guard members block an intersection during a rally against the death in Minneapolis police custody of George Floyd, in Washington, U.S., June 3, 2020.

Armoured vehicles are pictured as National Guard members guard the area in the aftermath of a protest after a white police officer was caught on a bystander's video pressing his knee into the neck of African-American man George Floyd, who later died at a hospital, in Minneapolis, Minnesota, U.S., May 29, 2020.

A demonstrator raises his hands as police officers and Washington, DC National Guard military police officers stand guard during a protest against the death in Minneapolis police custody of George Floyd, near the White House, in Washington, U.S., May 30, 2020.

Cleveland Police and Ohio National Guard block off a road to the city after a mandatory lockdown after days of protests and riots against the death in Minneapolis police custody of George Floyd, in Cleveland, Ohio, U.S. June 1, 2020.

A man confronts a National Guard member guarding the area in the aftermath of a protest against the death in Minneapolis police custody of African-American man George Floyd, in Minneapolis, Minnesota, U.S., May 29, 2020.

National Guard personnel are seen during a protest against the death in Minneapolis in police custody of African-American man George Floyd, near Centennial Olympic Park in Atlanta, Georgia, U.S. June 1, 2020.

Washington, D.C. Army National Guard military vehicles sit staged at the D.C. Armory for use on the streets of Washington ahead of the expected resumption of protests over the death in police custody of George Floyd, in Washington, U.S., June 3, 2020.

An Airman with the Air National Guard stands guard during a protest against the deaths of Breonna Taylor by Louisville police and George Floyd by Minneapolis police, in Louisville, Kentucky, U.S. May 31, 2020.

Minnesota Army National Guard Chaplains take a knee with protesters during a peaceful demonstration near the Minnesota State Capital after a white police officer was caught on a bystander's video pressing his knee into the neck of African-American man George Floyd, who later died at a hospital, in St. Paul, Minnesota, U.S. June 2, 2020.

A member of Massachusetts National Guard looks on as demonstrators march during a protest following the death in Minneapolis police custody of George Floyd, in Boston, Massachusetts, U.S., June 3, 2020.

Members of the National Guard and Seattle Police at front wear gas masks and riot shield as they stand behind a barrier while protesters rally following the death in Minneapolis police custody of George Floyd, near the department's East Precinct in Seattle, Washington, U.S. June 3, 2020.

A Washington D.C. National Guard member looks out of a military vehicle while riding along West Executive Drive following national protests against the death of George Floyd in Minneapolis police custody, at the White House in Washington, U.S., June 1, 2020.

Protesters use umbrellas at the front line of a barricade guarded by Seattle police and the National Guard following the death in Minneapolis police custody of George Floyd, near the department's East Precinct in Seattle, Washington, U.S. June 3, 2020.

People walk past an assembly of National Guard near the Georgia State Capitol near a protest against the death in Minneapolis of African-American man George Floyd, in Downtown Atlanta, Georgia, U.S. May 31, 2020.

A National Guard personnel points a rubber bullet gun at protesters during a protest against the death in Minneapolis in police custody of African-American man George Floyd, in Atlanta, Georgia, U.S. June 1, 2020.

A National Guard member mounts guard as a man exercises during a rally against George Floyd death in Minneapolis police custody, in Los Angeles, California, U.S., June 2, 2020.

The National Guard protects a barricaded Centennial Olympic Park in Downtown Atlanta during a protest against the death in Minneapolis police custody of George Floyd, in Atlanta, Georgia, U.S. May 30, 2020.

National Guard's members are seen in front of the Dolby Theatre along Hollywood Boulevard during a rally against George Floyd death in Minneapolis police custody, in Los Angeles, California, U.S., June 2, 2020. Image used for illustrative purpose.

A demonstrator reacts while standing in front of National Guard members during a protest against the death in Minneapolis police custody of George Floyd, near the White House in Washington, U.S., June 3, 2020.

People are reflected in a National Guard vehicle during a demonstration against the death in Minneapolis police custody of African-American man George Floyd, in Minneapolis, Minnesota, U.S., May 29, 2020.

A soldier with the Army National Guard stand on the street during a protest against the deaths of Breonna Taylor by Louisville police and George Floyd by Minneapolis police, in Louisville, Kentucky, U.S. May 31, 2020.

A child carrying a small broom walks by a line of National Guard members deployed to Bellevue Square as community members clean up after looting and vandalism that occurred Sunday at Bellevue Square in downtown Bellevue, Washington, U.S. June 1, 2020.

DC National Guard Military Police officers stand guard behind a fence surrounding Lafayette Park outside the White House as protests continue over the death in police custody of George Floyd, in Washington, U.S., June 2, 2020.

A man confronts a National Guard member as they guard the area in the aftermath of a protest against the death in Minneapolis police custody of African-American man George Floyd, in Minneapolis, Minnesota, U.S., May 29, 2020.

Soldiers with the Army National Guard stand with Louisville Metro Police block a street during a protest against the deaths of Breonna Taylor by Louisville police and George Floyd by Minneapolis police, in Louisville, Kentucky, U.S. May 31, 2020.

Military vehicles carrying National Guard personnel drive along West Executive Drive, following national protests against the death of George Floyd in Minneapolis police custody, at the White House in Washington, U.S., June 1, 2020.