The X-43C was indefinitely suspended in March 2004.Morris, Jefferson. "X-43C, RS-84 Engine Among Casualties Of NASA Review." Aviation Week, March 19, 2004. Retrieved: January 9, 2010. The linked story reports the project's indefinite suspension and the appearance of Rear Admiral Craig E. Steidle before a House Space and Aeronautics subcommittee hearing on March 18, 2004. In mid-2005, the X-43C appeared to be funded through the end of the year."Good news travels fast." Boeing Frontiers, August 2005. Quote: "Thanks to a funding request of $25 million for NASA sponsored by U.S. Rep. Jim Talent (R-Mo.), work on the X-43C program will continue through 2005."
