SCU analysis of 874 UAP incidents at US atomic facilities 1945–1975 found strong support for atomic weapons survey as NHI primary intention. 1949, Killeen Base/Fort Hood (Q site storing first atomic bombs): UAP incidents so frequent the Army established triangulated instrumented observation posts producing exact size/distance/speed measurements. Fourth Army then convened weekly Intel meetings with Army CIC, Navy Intelligence, FBI, and Armed Forces Special Weapons Project. Army/Navy assessed incidents as “a source of grave concern.” Official Army conclusion after systematic analysis: “unknown phenomena in the Camp Hood area could not be attributed to natural causes.” UAP observed at ground level, below 40 feet, one object descending vertically directly in front of a soldier. Pattern repeated across 5 categories of atomic site: materials production, weapons assembly, weapons stockpiles, deployment sites, and missile testing. UAP disproportionately targeted facilities handling weapons-grade uranium isotope separation, not standard military bases.