Congratulations, you're going to Denver for the DNC! While you're making lists of things to pack, thinking about all of the great people you're going to meet, and dreaming about the stories you're going to write don't forget to prepare for altitude sickness. Even if you've never experienced it before you will want to be prepared, just in case.
What is altitude sickness?
Air sickness is a pathological condition that is caused by acute exposure to low air pressure.