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After additional deposits were made in 1983, 2001 and 2013, the original capsule was replaced with a larger stainless steel container that now holds over 800 items in an atmosphere of inert nitrogen gas in the hope that this will better preserve the artefacts inside. [23] The Jurong Town Corporation buried a time capsule under Jurong Town Hall ...
Thatcher wasn't harmed, five others were killed and 31 were injured. A time bomb (or a timebomb, time-bomb) is a bomb whose detonation is triggered by a timer. The use or attempted use of time bombs has been for various purposes including insurance fraud, terrorism, assassination, sabotage and warfare.
The local community in Dayton was concerned that the cleanup did not meet 21st-century environmental standards. Therefore, the state of Ohio asked the United States Congress to have the Army Corps of Engineers conduct a review. This was carried out in 2004 and 2005.
Workers at the site were represented by the Oil, Chemical and Atomic Workers International Union (OCAW). [1] Mound was declared a Superfund site and was put on the National Priorities list in 1989. In 2002, a decision was made to close the plant by 2006. [2] Cleanup of the site began in 1995. Work with tritium ended in 1997.
1933 – Leó Szilárd realizes the concept of the nuclear chain reaction, although no such reaction was known at the time. He invented the idea of an atomic bomb in 1933 while crossing a London street in Russell Square. He patented it in 1934. (British patent 630,726)
The third most populous state in the Union at the time, Ohio raised nearly 320,000 soldiers for the Union army, third behind only New York and Pennsylvania. Nearly 7,000 Buckeye soldiers were killed in action. [88] Several leading generals were from the state, including Ulysses S. Grant, William T. Sherman, and Philip H. Sheridan.
This is a list of National Historic Landmarks in Ohio and other landmarks of equivalent landmark status in the state. The United States' National Historic Landmark (NHL) program is operated under the auspices of the National Park Service, and recognizes structures, districts, objects, and similar resources according to a list of criteria of national significance. [6]
4000 BC: Probable time period of the first diamond-mines in the world, in Southern India. [124] 4000 BC: Paved roads, in and around the Mesopotamian city of Ur, Iraq. [125] 4000 BC: Plumbing. The earliest pipes were made of clay, and are found at the Temple of Bel at Nippur in Babylonia. [126] [b]