Jan. 7—The number of canceled flights to or from Seattle-Tacoma International Airport grew Sunday in the wake of a serious incident that led to a federally mandated grounding of most Boeing 737 MAX 9 models nationwide. As of 2:30 p.m. Sunday, 96 flights were canceled, a spike from the 86 flights canceled throughout the day Saturday, according to the flight-tracking website FlightAware. An ...