Over 200 individuals lost their lives this week following a collapse at the Rubaya coltan mine in the eastern region of the Democratic Republic of Congo, according to Lumumba Kambere Muyisa, spokesperson for the governor appointed by rebels in the area. The information was shared with Reuters on Friday. Rubaya contributes nearly 15% to global coltan production. This mineral is refined into tantalum, a heat-resistant metal critical for manufacturing smartphones, computers, aerospace equipment,