The U.S. government ordered 120,000 people of Japanese descent, most American citizens, imprisoned during World War II. An admission of wrongdoing and reparations payments came decades later, but a Supreme Court ruling had lasting impact.

According to experts who monitor the radical right, the white supremacist ideology that police say drove the Buffalo gunman has begun moving from the extremes into the mainstream. This is the fifth episode of a five-part series produced in collaboration with The WNET Group’s reporting initiative Exploring Hate.

Violent attacks involving extremist ideology, like the Buffalo rampage, began to rise in the last decade, but officials were slow to recognize homegrown threats. This is the fourth episode of a five-part series produced in collaboration with The WNET Group’s reporting initiative Exploring Hate.

In the years before Barack Obama was elected, many groups on the extreme right kept a relatively low profile. With the election of a Black president, that changed. This is the third episode of a five-part series produced in collaboration with The WNET Group’s reporting initiative Exploring Hate.