As a crowded airliner is about to take off, the peace is shattered by a five-year-old boy who picks that moment to throw a wild temper tantrum. No matter what his frustrated, embarrassed mother does to try to calm him down, the boy continues to scream furiously and kick the seats around him. Suddenly, from the rear of the plane, a man in a U.S. Marine Corps uniform is seen slowly walking forward up the aisle. Stopping the flustered mother with an upraised hand, the courtly, soft-spoken Marine le…