1898 – Social Democracy of America party holds 1st national convention, Chicago
1924 – George Leigh-Mallory disappears 775′ from Everest’s summit
1942 – Germany Army marches into Sebastopol, Russia
1962 – NASA civilian test pilot Joseph A. Walker takes X-15 to 31,580 m
1980 – 112th Belmont Stakes: Eddie Maple aboard Temperence Hill wins in 2:29.8
1987 – Andy Van Slyke HRs off R McDowell in both ends of double header
1989 – For one second this morning, the time is 01:23:45, 6-7-89
2018 – Mars Curiosity Rover finds organic matter, including methane, on Mars in studies published in journal “Science”