One serious drawback about letters is that, in order to get them, one must send some out. When it comes to the mail, I feel it is better to receive than to give.
If you compare the size of our reserves of Saudi Arabia and the whole Middle East, it's like three times as much as all of that combined and that's just the easily, readily available 1800 billion barrels and there are probably 3 billion barrels that are commercially just under that, available.