On July 27, Top officials from the U.S. Federal Aviation Administration, State Department, and Transportation Department testifying before the Aviation Subcommittee of the House Transportation and Infrastructure Committee joined Republican and Democratic members in criticizing an EU plan to cap GHG emissions from international flights to or from Europe beginning in 2012. Some of the experts told the committee that the plan violates U.S. sovereignty and undermines international efficiency and safety cooperation. The Obama administration officials would not endorse H.R. 2594, a bill introduced on July 20 by House Transportation Committee Chairman John Mica (R-FL) and several Democrats that would exempt U.S. airlines from the proposed EU scheme.