sentences:  Development work had not started before the program was terminated in November 2001; CG-21 was replaced by the CG(X) program, which was subsequently cancelled in 2010.The winner of the competition to design the DD-21 was due to be announced in March 2001, but the decision was put back twice as the new Bush administration reviewed defense spending.On March 1 it was announced that the decision would be made in May, and on May 31 it was announced that the Navy would wait for the results of the Quadrennial Defense Review, and a future shipbuilding review.