Here's the latest twist in the Air Force tanker saga: The Russians are coming. Russia's government-owned aerospace company will announce Monday it is competing against Boeing for the $40 billion refueling tanker contract, a Los Angeles attorney for the company said Friday. United Aircraft of Moscow plans to unveil a U.S. partner and offer a modified version of its Ilyushin-96 wide-body plane, John Kirkland, head of the corporate securities practice at Luce Forward, said in an interview. The still-unidentified partner, "a U.S. public company and existing defense contractor," would assemble the planes in the U.S., he said. The Russian interest...