On July 18, 1970, Prince Charles, then 21, and his sister Princess Anne attended a baseball game at Robert F. Kennedy Memorial Stadium in Washington, D.C., as part of their first official visit to the White House. The game featured the last-place Washington Senators against the California Angels, and only about 8,500 fans were in attendance, significantly below the average crowd. Charles appeared baffled by the rules of baseball, asking questions about why a foul ball was not a home run. The experience was described as uncomfortable, with the royal party enduring the heat of a 91-degree afternoon before moving to a shaded box seat after just one inning. Despite the lack of excitement, Charles and Anne were surprised by the playing of the British national anthem before the game. Afterward, Charles met with President Richard Nixon for over an hour to discuss environmental issues and other topics. The visit highlighted the cultural differences between the British monarchy and American sports, with the Washington Post noting the difficulty in explaining the allure of baseball, much like the enduring nature of the monarchy itself.