House Committee on Transportation and Infrastructure Chairman John Mica(R-FL) and U.S. airline representatives March 28 urged the administration to use an international aviation treaty to challenge the European Union’s plan to include American carriers in its Emissions Trading System. A proposed challenge under the Convention on International Civil Aviation, or the Chicago Convention aviation treaty, would place the dispute in yet another venue. The administration has not ruled out the challenge, but wants to consider all potential scenarios first.