A Cobalt-60 machine, donated to Mulago Hospital in 1995 broke down in April 2016, thereby rendering radiotherapy unavailable for tens of thousands of Ugandan cancer patients.   

Most recent reporting on the issue:

http://www.aljazeera.com/indepth/inpictures/2017/03/waiting-die-uganda-untreated-cancer-patients-170306090150882.html

Previous articles:

http://www.bbc.com/news/world-africa-35997075

https://www.theguardian.com/world/2016/apr/12/uganda-mulago-radiotherapy-machine-crowdfunding