- On February 28, 1969, eight Black Panthers from the party’s Seattle chapter arrive in Olympia and stand on the steps of the state capitol building holding rifles and shotguns to protest a bill passed by the legislature the day before that would make it a misdemeanor to exhibit firearms or other weapons in a manner manifesting intent to intimate others. A Washington State Patrol officer asks the Panthers to unload their weapons and they do. After Seattle chapter captain Aaron Dixon (b. 1949) reads a statement to the legislature, the Panthers leave the capitol grounds and return to Seattle. The dramatic protest notwithstanding, Governor Dan Evans (1925-2024) signs the gun-control measure into law that same day.
- Empty set (Wikipedia)
In mathematics, the empty set is the unique set having no elements; its size or cardinality (count of elements in a set) is zero. Some axiomatic set theories ensure that the empty set exists by including an axiom of empty set, while in other theories, its existence can be deduced. Many possible properties of sets are vacuously true for the empty set.