Cutter Consortium Fellow Ed Yourdon recently suggested that a dramatically successful cyber-terrorism attack might lead to a government-imposed mandate to use open-source software. In his latest book Byte Wars, Yourdon suggests that since September 11 we live in a world of unpredictable, and sometime malevolent, disruptive change. In the book he argues that this new state of affairs, which will probably persist for the next several years, is likely to cause a number of paradigm shifts in the IT industry, as well as various other parts of society. This potentially-mandated use of open source is one such change.