The technological edge the United States and United Kingdom enjoy in high-performance computing and other critical military technologies is "under threat," and attempts by the two nations to address the problem by turning to commercial-off-the-shelf capabilities will prove futile, according to a first-of-its-kind joint report recently unveiled by the Defense Science Board and the U.K. Defence Scientific Advisory Council. The two groups, which formed a task force or "working party" to examine vital technologies, say American and British leadership is...