And, everyone in Kenya would know of the cojoined twin separation surgery in 1961. It would be all over the papers.
They may know but have been told to shut up. However, it’s also not uncommon for conjoined twins to be flown to another country for separation surgery. Sometimes the sibling doesn’t survive.
This first link offers a video of conjoined African babies who were flown to the US for surgery.
http://africanamerica.org/displayForumTopic/content/207044419469604744/reply/lastReply
Here conjoined twins were flown to Saudi Arabia
http://www.dailymail.co.uk/news/worldnews/article-1287126/Iraqi-conjoined-twins-undergo-separation-surgery-thanks-King-Saudi.html