Rules of the Game: For FIFA matches, the ball should have a circumference of not more than 70 cm (28 ins) and not less than 68 cm (27 ins).
The FA Cup in England is the world's oldest soccer competition, having first taken place in 1871.
The United States is a member of CONCACAF, the Confederation of North, Central American and Caribbean Association Football.
The African Cup of Nations, the main international football competition in Africa, was first held in 1957.
London's new Wembley Stadium, which opened in 2007, has a seating capacity of 90,000.
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