(Bloomberg) -- Takahiro Mori traveled more than 12 hours from Tokyo to Pittsburgh to secure what he hoped would be one of the biggest-ever steel mergers. On the other side of the table from the Nippon Steel Corp. executive sat the one man who now appeared to have the fate of the $14 billion deal in his hands: David McCall, head of the United Steelworkers union.Most Read from BloombergIran’s Better, Stealthier Drones Are Remaking Global WarfareTrumpism Is Emptying ChurchesUkraine Says It’s Behind