This image shows the first instant of the French nuclear test Pégase, which took place at Mururoa Atoll in French Polynesia today in 1970. Pégase is of course French for Pegasus, but this particular aerial phenomenon isn’t something you ride through the sky to perform acts of heroism. The protrusions at the bottom of the plasma ball are wires used to stabilize the testing tower vaporizing, a phenomenon you can see in better detail here and here. You can also see a typical testing tower with wires intact here.
1964—Mass Student Arrests in U.S.
In California, Police arrest over 800 students at the University of California, Berkeley, following their takeover and sit-in at the administration building in protest at the UC Regents’ decision to forbid protests on university property.