A giant tarp lies on the floor of the new Boeing 777X Composite Wing Center a day ahead of its grand opening, Thursday, May 19, 2016, in Everett, Wash. The facility, which is still under construction, will manufacture the world's largest composite wings for Boeing's newest commercial jetliner, the 777X. The new $1 billion, 1 million square foot center is close to the widebody plant where the 777X will be assembled because the wings are the largest Boeing has ever built ? 114 feet long and 23 feet wide. (AP Photo/Elaine Thompson), APTOPIX