Beech Boy. .. . </font><blockquote><font size="1" face="Verdana, Arial, Helvetica">quote:</font><hr /><font size="2" face="Verdana, Arial, Helvetica"> an environment where the air is so lacking in oxygen that you would not be able to sustain the striking of a match if they were expose to the elements.. .</font><hr /></blockquote><font size="2" face="Verdana, Arial, Helvetica">Oxygen is still there in the same ratio as it is at sea level...........unless Messrs Pratt and Whitney et al have been having a real lend of us.. .. .But they like us, need it to be delivered in a denser form to enable the combustion process thereof.. .. .I'm in a picky mood today, forgot to take my Prozac, but I know what you are trying to say