
Two people connected to the development of a critical aerospace material known as Mondaloy — an alloy used in advanced rocket engines — have disappeared in separate incidents, raising questions about a pair of unusual and currently unexplained missing-person cases.
Authorities say aerospace engineer Monica Jacinto Reza vanished in June 2025 while hiking in Southern California, and retired U.S. Air Force Maj. Gen. William Neil McCasland disappeared in February 2026 after leaving his home in Albuquerque, New Mexico.