Testifying before the Senate Armed Services Committee today, Director of National Intelligence James Clapper, repeated his position that Iran has not yet decided whether to develop a nuclear weapon. Clapper, both in his prepared remarks [PDF] and in an exchange with Sen. Lindsey Graham (R-SC), emphasized that sanctions and diplomacy were the best option for stopping Iran from acquiring a nuclear weapon and that Iran’s decision making is guided by a a rational “cost-benefit approach.”