Flight leaving Mass. airport forced to make emergency landing

A United Airlines flight heading to San Francisco from Boston was forced to make an emergency landing in Denver on Tuesday due to a “potential mechanical issue,” the latest incident involving Boeing’s 737 MAX planes. The flight landed safely in Denver, and United arranged for the 177 customers to board another plane to get them to their destination. Officials did not say what exactly forced the emergency landing. Flight Aware, an online flight tracking system, shows the flight left Boston at 6:34 a.m. and landed in Denver at 11:28 a.m....