FILE PHOTO: Boeing 787 Dreamliners are shown in final production at widebody factory in North Charleston, South Carolina, U.S., January 17, 2019. REUTERS/Eric Johnson/File Photo
FILE PHOTO: Boeing 787 Dreamliners are shown in final production at widebody factory in North Charleston, South Carolina, U.S., January 17, 2019. REUTERS/Eric Johnson/File Photo

Boeing's 787 production move raises questions over historic Seattle area base