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.
The youngest living president is the incumbent, Barack Obama, born August 4, 1961 (aged 7009171084960000000â  54 years, 78 days). The longest-lived president was Gerald Ford, who died at the age of 93 years and 165 days. Ronald Reagan was the second longest-lived, 45 days short of Ford.