Boeing chief executive Dave Calhoun on Tuesday apologized to the relatives of the victims of the fatal crashes involving the aircraft maker’s 737 airplanes in 2018 and 2019 during a hearing at the US Senate. A total of 346 people lost their lives in the accidents. “We are deeply sorry for your losses,” Calhoun said on Tuesday addressing several of the victims’ relatives present. “Nothing is more important than the safety of the people who step on board our airplanes. Every day we seek to honor the memory of those lost through a steadfast commitment to safety and quality.” The accidents involvi…