This Day in History: June 30International Asteroid Day
1894 – The Tower Bridge was opened in London. It crosses the River Thames close to the Tower of London and has become a world-famous symbol of London.
1908 – over the central part of Siberia, in the interfluve of the Lower Tunguska and the Lena rivers, a giant ball, called the Tunguska meteorite, flew by and then exploded.
1941 – The first two combat launchers BM-13 «Katyusha» were assembled.
1972 – Leap second (23:59:60) was introduced to coordinate universal time for the first time.
1982 – the first search and rescue satellite «Kosmos-1383» was launched.
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