Memorial Day marks the 100th anniversary of the 1921 Tulsa race massacre, one of the deadliest episodes of racial violence in U.S. history, when the thriving African American neighborhood of Greenwood in Tulsa, Oklahoma — known as “Black Wall Street” — was burned to the ground by a white mob. An estimated 300 African Americans were killed and over 1,000 injured. Whites in Tulsa actively suppressed the truth, and African Americans were intimidated into silence.

We go to Goma in the Democratic Republic of the Congo, where tens of thousands of people are evacuating the city of Goma after a volcanic eruption killed dozens on May 22 and amid warnings that Mount Nyiragongo, one of the world’s most active volcanoes, could blow yet again.

As the United Nations human rights chief warns Israel may have committed war crimes in Gaza, we look at how Israel killed 12 Palestinian children being treated for trauma from past Israeli bombings. Jan Egeland, secretary general of the Norwegian Refugee Council, says Gaza has become “the home of hopelessness,” particularly for young people in the besieged territory.

Despite decades of warnings against the practice, police departments across the country continue to hogtie people during arrests, sometimes with fatal results. On September 8, 2018, Marcus Smith, a 38-year-old homeless Black man in Greensboro, North Carolina, was facing a mental health crisis and asked police officers for help. Instead, eight white officers brutally and fatally hogtied him.

Protests and vigils were held across the U.S. to mark one year since the police murder of George Floyd in Minneapolis. Floyd’s death sparked a national uprising and global movement against systemic racism and police brutality.