Public Gatherings Terrorist Attacks Public Demonstrations Ceremonies Cultural Celebrations Protests Memorial Services Public Ceremonies Public Remembrance Peace Ceremonies Public Statements Rallies Memorials D-Day Cultural Events Community Events Public Protests Public Safety Military Commemorations Hiroshima Peace Memorial Political Events Exhibitions Historical Events October 7 Attack Public Memorials Public Installations Media Events Public Vigils Public Celebrations Princess Diana's Death Victim Remembrance Silent Marches Silent Walks Historical Celebrations Public Services Srebrenica Memorial Nuclear History Aviation Accidents Silence Observances Public Awareness Public Announcements Hiroshima Ceremony Vigils for Peace Hiroshima Bombing Hiroshima Anniversary Peace Events Victory Day Political Figures Cultural Significance Natural Disasters Community Gatherings Sensitive Dates Disasters September 11 Public Reactions Explosions 1985 Earthquake Anniversary Deaths Natural Disaster Anniversaries Latur Earthquake Anniversary Hostage Release Tragic Events Peace Initiatives Public Memory Personal Tributes Local Events Río Tercero Celebrations Maritime Disasters Church Events Cultural Gatherings Exhibits 50th Anniversary of Shipwreck Thanksgiving Violent Incidents 26/11 Memorials Diego Maradona Terrorism Overseas Events Dwindling Numbers D-Day Commemoration Arrests D-Day Invasion Vigils Survivor Stories October 7 Conflict Anniversaries Security Alerts Hamas Attacks Military Attacks École Polytechnique Train Derailment Anniversary Invasion Anniversaries Military Conflicts Political Gatherings Ukraine War Anniversary MH370 Anniversary 20th Anniversary 10th Anniversary of Passing George Floyd Memorial
Fifty years on, memorials revisit the evidence, with no definitive cause.