National Review: Planning for the Unthinkable
- Texas Senator John Cornyn proposes a constitutional amendment to deal with catastrophes in which many members of Congress are killed. The Constitution currently requires a majority quorum to function.
- http://www.nationalreview.com/comment/cornyn200311050737.asp

Ensuring the Continuity of the United States Government
- U.S. Senate subcommittee hearing on January 27, 2004 regarding a proposed constitutional amendment for keeping Congress functioning in the wake of an attack. Statements of Senators and testimony of witnesses are available.
- http://judiciary.senate.gov/hearing.cfm?id=1022