The Justice Department has asked for more information as part of its review of the American Airlines-US Airways merger.
The "second request" was received by the two carriers on Monday. The carriers said they will "respond promptly" to the request and are working with the DOJ in its review of the merger.
The merger still needs to be approved by the bankruptcy court and by US Airways shareholders. The carriers said they expect the merger to close in the third quarter of 2013.-Andrea Ahles