I have been intrigued by Yemen for a long time, not the least of which is due to having places that seem other-worldly, particularly from a photography standpoint.
I always read about terrorists breeding there, but the situation on the ground seems very different. If there were many visitors helping the economy, perhaps the crazy people known as terrorists would not get started. Besides, if a terrorist wanted to do something, logically people visiting Yemen would be a very bad target. Anybody that goes to Yemen is already doing something that could be dangerous in the eyes of people back home, so if they got killed, the impact in news media would be relatively small. A foreign attack would have a lot higher visibility.