Signage for Palantir is seen during the Association of the United States Army annual meeting and exposition at the Walter E. Washington Convention Center in Washington on Oct. 14, 2024.Nathan Howard | ReutersThe much-needed modernization of the U.S. Army's battlefield communications network being undertaken by Anduril, Palantir and others is rife with "fundamental security" problems and vulnerabilities, and should be treated as a "very high risk," according to a recent internal Army memo.The two...