← ENCOUNTERS DIRECTORYENCOUNTER-CLAIM PROVENANCE PRESENT
E-005306LANDMARK CASE · HIGH CORROBORATIONDATE PRECISION: rangeRECORD COMPLETENESS: 100%
Malmstrom Weapons Storage Area Unknown-Intruder Report
Fall 1975, before Joseph Chassey separated from the Air Force in OctoberMalmstrom AFB Weapons Storage Area, Montana, United States
Joseph Chassey recalled directly hearing an urgent Security Police radio call concerning an unknown intruder over Malmstrom’s nuclear Weapons Storage Area. The next day he heard that helicopters had pursued a brilliant object toward Belt. Former helicopter-unit commander Robert Peisher later acknowledged hearing about such a pursuit, but Hastings identifies chronology problems in their accounts.
// LINKED CLASSIFICATIONS:Nuclear & Defense Incursions(P-000102)→
// PROVENANCE COVERAGE
100% record completeness
This measures documentation coverage, not whether the encounter or its claims are true.
1 SOURCES · 0 PRIMARY
Date documented
Fall 1975, before Joseph Chassey separated from the Air Force in October
Location documented
Malmstrom AFB Weapons Storage Area, Montana, United States
Map coordinates available
Coordinate precision: approximate.
Catalogue classification linked
1 family link(s), 0 case-specific component(s).
Published citation-backed claims
3 encounter-target claim(s), 0 component claim(s).
Source coverage
1 unique source edition(s); 0 marked primary for at least one claim.
Assessment has encounter-level provenance
3 encounter-target published claim(s) can carry assessment provenance.
This dossier currently depends on a single source edition; independent coverage would strengthen comparison.
No cited source is currently marked as primary for the published claims shown here.
// ASSESSMENT METADATA
Stored case-assessment fields
Stored total witness estimate2
Stored verified-report count0
Instrumental evidence flagNO
Official investigation flagNO
// ENCOUNTER LOCATION · OPENSTREETMAP
COORDINATE PRECISION: APPROXIMATE