Especially re: guards and just an idea of how poor these people were, I used to be flight crew for what was known as The Houston Express…a few different airlines over the last few decades have operated these flights. They fly Americans, mostly in the oil industry to and from Angola. Many would work 3 weeks ‘on’, then 3 weeks off, so fly back and forth very often. The majority were oil rig workers.
Our transport to and from the hotel was a usual looking shuttle, but we had 2 (very!) armed guards with us at all times that just stood at the door. We weren’t allowed to leave our hotel at all. Luanda then was something like 90% poor and 10% rich. This succeeded their civil war.
The people on the streets would literally sell anything they could get their hands on - one of my most distinct memories was a guy walking along the vehicles trying to sell an old, kinda beat up standing metal coat rack.
During one stay my room looked out over a few low buildings. On the rooftop of a 4 story building, I saw 3 children with what turned out to be an empty plastic bucket. They ‘played’ with it for a couple of hours. Initially, I kept waiting to see what could have been inside of it. Nothing. There was literally not even water in it. It was their toy!
Just my .02 on how impoverished it is there

(not that anyone doubted!)