Video footage captured by passengers shows smoke emitting from the aircraft and flames sparking out of one of the wings. The FAA said it will be investigating the United Airlines incident in Houston.

Without Denver International Airport and United Airlines, Colorado would be a much different state. We should welcome more of each with open arms, as they expand on the plains of northeast Denver.

The aircraft traces its origins to the French Ministry of Civil Aviation’s November 5, 1951 specification for a “moyen ...