U.S. President Richard Nixon and first lady Pat Nixon are seen as they visit the tombs of Chinese emperors of the Ming Dynasty, in the suburbs of China’s capital of Beijing, Feb. 24, 1972.

Visitors to the Nixon Library celebrate the Pat Nixon Day of Service with a community involvement fair and wreath laying.

Pat Nixon served as Second Lady for eight years and First Lady for five ... In 1972, she accompanied her husband to China and Russia, resulting in an easing of strained relationships.