Iran will pursue construction at the Arak heavy-water reactor, Foreign Minister Mohammed Javad Zarif was quoted as saying on Wednesday, despite a deal with world powers to shelve a project they fear could yield plutonium for atomic bombs. France, one of the six powers that negotiated Sunday's interim pact with Iran to curb its disputed nuclear program, said in response to Zarif's statement that Tehran had to keep to what was agreed in the Geneva talks. The uncompleted research reactor emerged as one of several big stumbling blocks in the marathon negotiations, in which Iran agreed to restrain its atomic...