Little more than a year after U.S. spy agencies concluded that Iran had halted work on a nuclear weapon, the Obama administration has made it clear that it believes there is no question that Tehran is seeking the bomb. Obama’s nominee to serve as CIA director, Leon E. Panetta, left little doubt about his view last week when he testified on Capitol Hill. “From all the information I’ve seen” Panetta said, “I think there is no question that they are seeking that capability.”