Boeing shares saw a pullback after a 737-800 aircraft with 132 people on board nosedived mid-flight, crashing into the mountains of Southern China. China's Eastern Airlines plane was not a 737-Max model, which was grounded worldwide after two fatal crashes in 2018 and 2019, but it's once again raising questions about the safety of Boeing's aircraft. Michael Boyd, CEO of Boyd Group International, gave Opening Bell his take on what another crash means for Boeing.