The official announcement hasn't yet come, but the merger between United Airlines and US Airways appears to be off. The companies confirmed earlier this week they were talking about terminating the deal. The acquisition would have made United much bigger than any of its competitors. Now it seems United doesn't think it can get permission for the deal from the Department of Justice, where anti-trust regulators fear it would stifle competition and lead to worse service for millions of airline passengers. Congressman Jim Oberstar is former chair of the House Aviation Subcommittee and senior democrat on the House Transportation Committee. He's on the line now.