Southwest Airlines, the cattle-car service of affordable air transportation, resumed flights this morning after yesterday's maintenance SNAFU grounded "approximately 4 percent" on Tuesday night. It seems that many of their airplanes failed to have safety checks last year, which resulted in yesterday's Southwest Airlines schedule meltdown and a drop in their stock price. But today, Thursday, "the majority of the planes removed from service have been returned" spokeswoman Christi Day tells CBS 5. Yesterday's......