777pipi,
You may get a better response to this Q on the African Forum. I haven't been through Angola (Luanda and Mocamides) for over a decade, thank god ,but it was a hell hole then and its not much better now(according to a mate still there working in retailing).
Bribes galore and armed gangs in the capital and a company culture such that when you depart Windhoek Int en route Luanda in your 737 and get invloved in a mid air collision with a twin prop out of Eros, you just continue your climb to cruise altitude and swan off to LAD as if nothing had happened.