Southwest Airlines will be the launch customer for Boeing's new 737 MAX airplane, announcing on Tuesday the first firm order for the new aircraft and the largest firm order in Boeing history, worth $19 billion.
When compared to its newer, larger, longer-range siblings, Boeing's 737-800 might not be the sexiest airliner in the skies. But when the world's largest 737 operator added them to its fleet this week, the aviation world was pay...