"Killer" is a misnomer -- in the beekeeping community, for obvious reasons, they prefer the term "africanized". And it is likely that these bees, being in Africa, are or will very soon be africanized.
But it is still possible to safely and enjoyably keep and tend Africanized bees -- you just require some extra precautions, like smoking the hell out of them when you're working the hive, and leaving your protective gear on even after you're far from the hive.
A friend of mine did beekeeping in Paraguay through the Peace Corps (the last country featuring a Peace Corps beekeeping program), and said bees would still be ramming his face veil, even after walking several kilometers away from the hive.
That was, however, after he had been working them for anywhere from a few minutes to a few hours. Generally bees don't bother you if you're not bothering them. And if they do, you might just wear a veil when harvesting the crops closest to the fence.