A bomb was planted at Harvey's Resort Hotel in Stateline, Nevada, which the FBI later described as the most complex improvised explosive device ever created.
Betty Friedan and the National Organization for Women organized the Women's Strike for Equality in New York City, in which 50,000 women protested the continuing lack of gender equality.
The U.S. Democratic Party's National Convention opened in Chicago, sparking four days of clashes (pictured) between anti-Vietnam War protesters and police.
The 1940 New England hurricane formed over the Atlantic Ocean; it would go on to cause widespread damage despite never making landfall in the United States.