Physical conditions or diseases that can cause knee pain: 1  osteoarthritis: pain, inflammation, and joint destruction caused by degeneration and deterioration of the joint. 2  tendinitis: pain in the front of the knee that is made worse when climbing, taking stairs, or walking up an incline.
Ages Of US Presidents. John F. Kennedy is the youngest-ever elected president, aged 43. However, Theodore Roosevelt is the youngest person to ever become president. He was 42 when he succeeded to the presidency, following the assassination of McKinley. Ronald Reagan is the oldest person ever to be elected president. He was 69.
He took the office in 1981 at 69 years old. Theodore Roosevelt is the youngest. He took the office in 1901 at the age of 42. Find the complete list of top 10 oldest United States presidents below: Ronald Reagan: 69 years old; William Henry Harrison:68 years old; James Buchanan: 65 years old; George H.W. Bush: 64 years old; Zachary Taylor: 64 years old