Iran has rejected an assessment by the U.N. nuclear agency that it did past work on nuclear arms but is praising some aspects of the agency's investigation of the issue, reflecting satisfaction that the more than decade-long probe has ended. Closure of the file means that some questions about the alleged weapons work may never be resolved. Before the 35-nation board of the U.N's International Atomic Energy Agency adopted a resolution last month ending the investigation, IAEA chief Yukiya Amano told the meeting that his investigation couldn't "reconstruct all the details of activities conducted by Iran in the past." But...