Asymmetry is the absence of, or a violation of, symmetry (the property of an object being invariant to a transformation, such as reflection).ymmetry is one of the most powerful tools in particle physics, because it has become evident that practically all laws of nature originate in symmetries. Violations of symmetry therefore present theoretical and experimental puzzles that lead to a deeper understanding of nature.
John Fitzgerald Jack Kennedy (May 29, 1917 â November 22, 1963), commonly referred to by his initials JFK, was an American politician who served as the 35th President of the United States from January 1961 until his assassination in November 1963.
JFK's inauguration speech: 50 years on. John F Kennedy became US president 50 years ago with the words 'Ask not what your country will do for you...'. President John F Kennedy gives his inaugural address at the Capitol in Washington after taking the oath of office. JFK's inauguration speech: 50 years on. John F Kennedy became US president 50 years ago with the words 'Ask not what your country will do for you...'. John F Kennedy's grave at Arlington cemetery, looking out over the Potomac river on Washington, is marked by an eternal flame and the words he delivered in his inauguration speech 50 years ago today.