A man displays a coltan ore at the SMB mine near the town of Rubaya in the Eastern Democratic Republic of Congo, August 13, 2019. Picture taken August 13, 2019. REUTERS/Baz Ratner/A man displays a coltan ore at the SMB mine near the town of Rubaya in the Eastern Democratic Republic of Congo, August 13, 2019. Picture taken August 13, 2019. REUTERS/Baz Ratner/A collapse at a coltan mine in eastern Democratic Republic of Congo's North Kivu province has killed at least 12 people, a mining source and a civil society source said on Friday.
