President Obama has warned that Iran is not open for business, even as the United States has loosened some of its punishing economic sanctions as part of an interim nuclear pact.Yet on Tuesday morning, Iran had an unlikely visitor: a plane, owned by the Bank of Utah, a community bank in Ogden that has 13 branches throughout the state. Bearing a small American flag on its tail, the aircraft was parked in a highly visible section of Mehrabad Airport in Tehran But from there, the story surrounding the plane, and why it was in Iran — where all but a...