In 2007 , Larry Sabato , a professor at the University of Virginia , criticized the incomplete nature of the plan in his book '' A More Perfect Constitution '' . In particular , he objected to the fact that there is no constitutional procedure for replacing U.S. House members in the case of a large-scale disaster which could potentially kill a large number of representatives . In regard to the Continuity of Operations Plan , Sabato said it " failed outright " during the September 11 attacks
September 11 attacks
September 11 attacks
United States federal government continuity of operations