ON THIS DAY- On this day 30 years ago, the US experienced the biggest single-day stock market collapse in history after the Dow Jones industrial average dropped 22.5% in what was known as Black Monday. In 1954, Egypt signed an agreement with the UK in 1954 to have it withdraw all of its troops from Egyptian territories within 20 months. The American Revolution effectively ended on this day in 1781 after British General Lord Cornwallis surrendered in Yorktown, Virginia. Born on this day in 1910 is Nobel Prize winning physicist Subrahmanyan Chandrasekhar, who won the award “for his theoretical studies of the physical processes of importance to the structure and evolution of the stars.” Nobel Prize award in Chemistry winner Ernest Rutherford died on this day in 1937.