NEW ORLEANS - The American Psychological Association took a stand against torture Thursday but kept an existing policy saying that it's ethical for psychologists to assist in military interrogations. Critics said the new policy, adopted at the group's convention, does not go far enough to keep its members from becoming embroiled in practices that could violate the principles of human rights. "The ultimate question is, should psychologists participate in national security interrogations, and the answer is no," said Leonard Rubenstein, executive director of Physicians for Human Rights. "It's a question that other medical groups have addressed and the APA has...