Actually Grand Central is now overgrown with Jungle. You will need a Machete just to get into the terminal.. Most all the Aircraft there are STOL as the runways have reverted to dirt and larger Potholes exist.
Satellite phone would be good to have, all the phone lines have been stolen and the dial up phones are not compatable with modern technology. Gangs of people are the concern, dont walk near crowds.
Wait.......Im sorry, I thought you were asking about Grand Central in New York......disregard all the above. Grand Central in South Africa is a pretty nice place.....in comparison
Actually the folks you do business with there will give you good advice. Your probably safer there than in London. Just keep your eyes open and listen to those there who give the advice.