Workers test robotic arms on a machine that will be used to perform water-based ultrasonic tests on wing parts at Boeing's 777X Composite Wing Center, Monday, June 12, 2017, in Everett, Wash. (AP Photo/Ted S. Warren)
Workers test robotic arms on a machine that will be used to perform water-based ultrasonic tests on wing parts at Boeing's 777X Composite Wing Center, Monday, June 12, 2017, in Everett, Wash. (AP Photo/Ted S. Warren) Ted S. Warren AP
Workers test robotic arms on a machine that will be used to perform water-based ultrasonic tests on wing parts at Boeing's 777X Composite Wing Center, Monday, June 12, 2017, in Everett, Wash. (AP Photo/Ted S. Warren) Ted S. Warren AP