Not entirely diving related but I thought you guys may be able to help. I need to send a team of guys to a town in Mexico that is situated at approximately 10000ft. A couple of my colleagues have visited the plant and complained about alititude sickness. We have been advised, rightly or wrongly, that compressed oxygen might be advisable to have around incase of emergency. My understanding is that compressed air cylinders should be empty and with the valve removed for transport by air, but this obviously is not an option in this case. Anyone with experience of this?