My, but Iran must have a lot of defective “industrial gas tanks” lying around. A week after Iranian officials tried to explain away a massive explosion at Parchin as a civilian-area accident, a large fire at Natanz might prove more difficult to dismiss. Natanz, like Parchin, is a site where the US alleges that Iran has performed work on their nuclear-weapons program, and experts believe that uranium-enriching centrifuge work might have been the target this time: Iran says there has been an “incident” at one of its nuclear facilities.Atomic Energy Organisation of Iran (AEOI) spokesman Behrouz Kamalvandi did not...