The United States and China have one of the world’s most important and complex bilateral relationships. Since 1949, the countries have experienced periods of both tension and cooperation over issues …

The International Olympic Committee says the games are not meant to be political. But governments and athletes have frequently used the Olympics to make statements through boycotts and protests.

Ukraine has been dogged by corruption scandals, economic mismanagement, and Russian interference since it achieved independence in 1991. Russian threats have intensified as Ukraine's ties with the Un…

Since Fidel Castro’s ascent to power in 1959, U.S.-Cuba ties have endured a nuclear crisis, a long U.S. economic embargo, and political hostilities. The diplomatic relationship remained frozen well b…