U.S. airlines are using those small barf bags in their seatback pockets to lobby against a possible increase in the $2.50 Sept. 11th security fee. “Are high taxes on air travel making you sick?” a trade association, Airlines for America, is asking on that on air sickness bags being distributed this week at Reagan National Airport near Washington. The goal is to persuade members of Congress—especially Republicans—that the 9/11 fee is merely a tax by another name and that a scramble for new revenue should not hit air travelers.