Sana'a, Capital of Yemen

Yemen seems to pop up in the news a lot more often than any two-bit third world hell hole in the back of beyond should have any right to. This time a couple of Belarusian military instructors got shot in the capital city of Sana'a. Hadn't heard of this place before, so I look it up on ye olde Wiki and find this:

Sana'a is one of the oldest continuously inhabited cities in the world. At an altitude of 7,500 feet, it is also one of the highest capital cities in the world. Sana'a has a population of approximately two million, making it Yemen's largest city.

Denver is a mile high, which is only 5,000 feet, so Sana'a is getting up there. And here I thought the Arabian peninsula was a big, flat stretch of sand. At that altitude is doesn't get all that hot even though it's in the hottest part of the world.