On this day in 1996 the British Royal Air Force engineer officer Sir Frank Whittle passed away. He was best known for inventing the turbojet engine for which he received the knighthood in 1948.
On May 27th 1937 The Golden Gate Bridge of San Francisco spanning over the opening of the San Francisco Bay and connecting the City with Marin County was opened for public traffic. When the planning for the bridge started back in 1916 many experts said that a bridge couldn’t be built across the 6,700 ft (2,042 m) strait.
T. Tilley, R. Cole, P. Becker, and P. Eklund. Formal Concept Analysis: Foundations and
Applications, volume 3626 of Lecture Notes in Computer Science, Springer, Berlin/Heidelberg, (2005)