FILE PHOTO: A man carries sacks of ore at a coltan mine near the town of Rubaya in the Eastern Democratic Republic of Congo, August 13, 2019. Picture taken August 13, 2019. REUTERS/Baz Ratner/File Photo
FILE PHOTO: A man carries sacks of ore at a coltan mine near the town of Rubaya in the Eastern Democratic Republic of Congo, August 13, 2019. Picture taken August 13, 2019. REUTERS/Baz Ratner/File Photo