"The Supreme Court, which asks for God's protection before every public session, will settle a dispute over prayer in the halls of government."

Credit: Reuters/Larry Downing/Files A U.S. Airways jet departs Washington's Reagan National Airport next to American Airlines jets outside Washington, in this February 25, 2013 file photo. The U.S. Department of Justice, six state attorneys general and the District of Columbia challenged the proposed merger on Tuesday saying the creation of the world's largest airline that would result would stifle competition, drive up airfares and reduce services.