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.
Title Who was the youngest first lady of the United States? At the age of 31, Jackie Kennedy captivated the nation with her youth and beauty when her husband was elected president in 1960. But it might surprise you to learn that she is only the third-youngest first lady in American history. Whoâs the youngest presidential wife ever? That title belongs to Frances Folsom Cleveland, who was only 21 when she married President Grover Cleveland on June 2, 1886, in the Blue Room of the White House.