Pik Botha and a delegation from South Africa were supposed to take Pan Am Flight 103 to New York to sign a treaty granting independence to Namibia, but managed to take an earlier flight and avoided being killed when the Libyan bomb blew the plane up.
What if they'd been on the plane and died?
I would expect South Africa to be very upset with Libya. What are their options for retaliation?
Given the issues the late apartheid regime was having and the distance, overt military intervention is going to be improbable. However, I'm imagining a big pile of kruegerrands for Gadhafi's head.