U.S. President Lyndon B. Johnson establishes the Warren Commission to investigate the assassination of President John F. Kennedy. However the long report that is finally issued does little to settle questions about the assassination, and today surveys show that only a small minority of Americans agree with the Commission's conclusions.

In Boston, Massachusetts, a fire in the fashionable Cocoanut Grove nightclub kills 492 people. Patrons were unable to escape when the fire began because the exits immediately became blocked with panicked people, and other possible exits were welded shut or boarded up. The fire led to a reform of fire codes and safety standards across the country, and the club's owner, Barney Welansky, who had boasted of his ties to the Mafia and to Boston Mayor Maurice J. Tobin, was eventually found guilty of involuntary manslaughter.

In the U.S., killer and bank robber Baby Face Nelson, aka Lester Joseph Gillis, dies in a shoot-out with the FBI in Barrington, Illinois. Nelson is shot nine times, but by walking directly into a barrage of gunfire manages to kill both of his FBI pursuers before dying himself.