(Reuters) - Southwest Airlines (LUV.N) said it expected to cancel 300 flights scheduled for Saturday to allow inspections of 79 aircraft from its Boeing 737 fleet, after one of its planes made an emergency landing with a gaping hole in the fuselage. Passengers aboard Southwest Flight 812 from Phoenix to Sacramento on Friday heard a loud noise and the hole appeared suddenly at about mid cabin, forcing the pilot to land at a military base in Yuma, Arizona. [Read more at link]