The right to breath
The St. Petersburg Times online reports: "Now there's encouraging news for travelers who require oxygen. In a move that alarmed airlines, the Department of Transportation has proposed requiring that airlines provide free oxygen for such passengers or let them use oxygen-generating devices deemed safe by the Federal Aviation Administration." Read the whole article if you want more details on that phrase about alarming the airlines. A mandate for them to accept or provide this clearly is the only way that it will be come routine.