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.
John F. Kennedy (1917-1963) was the youngest candidate ever to be elected president, and he served from 1961-1963. (This year we will mark the 50th year since his assassination.) Kennedy. came into office with a young wife, Jacqueline, and two children, Caroline and John Jr.