More than 30 years ago after the Cuban missile crisis of 1962 and the failed US backed invasion of Cuba at the Bay of Pigs, the United States government imposed an economic embargo of that island. Trade and travel to Cuba were prohibited under most circumstances. Under the Trading With the Enemies Act, that policy has softened and then heartened over the years. Most recently, it was tightened under legislation sponsored by Representative Robert Torricelli of New Jersey, the Cuban Democracy Act. Now that policy is being challenged by a group led by several religious leaders. It's an effort known as Pastors for Peace.