A planeload of North Korean arms seized in Bangkok was reportedly bound for Iran, which has been buying up large amounts of weaponry in recent months as it braces for a possible onslaught by Israel, and possibly the United States. Mystery has shrouded the destination of the Georgian-registered Ilyushin Il-76 cargo plane that was found be to carrying 35 tons of arms, including surface-to-air missiles and rocket launchers, in 12 crates when it was detained during a refueling stop on Dec. 11 following a tip-off from U.S. intelligence. The five-man crew, all former Soviet air force members from Belarus and...