- Today in History: May 18, Mount St. Helens volcano erupted - Baltimore Sun
- Today in History—May 23: The First Great American Road Trip - Britannica
- Today in History - May 19: Hollywood A-lister's wife killed during hide-and-seek freak accident
- May 18, 1980 #todayinhistory #history #disaster #volcano #mtsthelens - YouTube
- Today in History May 21 | 1980, Jekyll and Hyde, Horror Movie, & Lost Film | Britannica
- Today in History May 20 | 1873, Levi Strauss, Patent, & Blue Jeans | Britannica
- May 18: Omaha-built 'Enola Gay' delivered to US Army Air Forces - YouTube
- Today in History: June 6, Allies land in Normandy on D-Day - Daily Independent
- Today in History: June 5, Robert F. Kennedy assassinated - Daily Independent
- Today in History: June 4, the Tiananmen Square Massacre - Midland Daily News