Alliances: The U.S. has expressed a willingness to barter away missile defense sites in Poland and the Czech Republic. Now the Polish foreign minister says he hopes his country doesn't regret trusting the United States.The Brussels Forum is a privately organized high-level meeting of the most influential North American and European political, corporate and intellectual leaders to address pressing challenges currently facing both sides of the Atlantic. One of the pressing issues discussed at this year's conference was whether the U.S. is serious about bartering away plans for missile defense sites in Poland and the Czech Republic in exchange for...