On 13th August 2013, the US Department of Justice (DOJ) and attorneys general from six US states and the District of Columbia filed suit in the US District Court for the District of Columbia to block the merger between US Airways and American Airlines. Days before, a group of American Airlines customers filed a claim that the merger would violate Section 7 of the Clayton Act.

The High Court has struck down a company voluntary arrangement on the ground that it unfairly prejudiced a landlord who was to lose the benefit of a guarantee given by the tenant’s parent company. The judge said it was “unreasonable and unfair in principle” to require the landlord to give up the guarantee and there was “no sufficient justification” for requiring the landlord to accept a sum of money in lieu.