Technical issues, development cost overruns, growing unit costs, and delays led to the termination of the A-12 Avenger II program on January 13, 1991, by Defense Secretary Dick Cheney. Years of litigation would proceed over the contract's termination: the government claimed that the contractors had defaulted on the contract and were not entitled to the final progress payments, while McDonnell Douglas and General Dynamics believed that the contract was terminated out of convenience, and thus the money was owed. The case was contested through litigation until a settlement was reached in January 2014. The chaos and financial stress created by the collapse of the A-12 program led to the layoff of 5,600 employees. The advanced tactical aircraft role vacated by the A-12 debacle would be filled by another McDonnell Douglas program, the F/A-18E/F Super Hornet.