Britain entered uncharted waters Friday after the country voted to leave the European Union, according to a projection by all main U.K. broadcasters. The decision shatters the stability of the project in continental unity forged after World War II in hopes…

Stocks fell in the Middle East, British pound futures fell versus the dollar, and U.S. shares appeared headed for a slightly lower opening on the first full day of trading since global markets plunged after Britain's vote to exit the European Union. The stock…