The pilots’ unions for Delta and Northwest approved a collective bargaining agreement, a key step in Delta’s efforts to acquire Northwest without mishap. The deal covers 12,000 pilots. The deal, which would create the world’s largest airline by traffic, was approved by European regulators last week; it still needs U.S. and shareholder approval. (AP in The New York Times) United Airlines pilots, meanwhile, called for the ouster of CEO Glenn Tilton, saying he’s running the airline into the ground. (MarketWatch)