ISLAMABAD (AP) ― Police are trying to determine whether five Americans detained in Pakistan had planned to attack a complex that houses nuclear power facilities, authorities said Saturday. The young Muslim men, who are from the Washington, D.C., area, were picked up in Pakistan earlier this month in a case that has spurred fears that Westerners are traveling to the South Asian country to join militant groups. Pakistani police and government officials have made a series of escalating and, at times, seemingly contradictory allegations about the men's intentions, while U.S. officials have been far more cautious, though they, too, are...