At the 6,400-acre Plum Brook Field Station complex near Sandusky, Ohio, stands five large test facilities operated by NASA to test various aspects of space flight. Most of these were built decades ago at a time when the country’s space program was of national importance. But now, these million-dollar facilities have fell into disuse and some are so rundown they would require millions of dollars more to repair. Out of the five still-standing facilities, four have seen no use in the recent past. Two are slated for demolition, one is not fully functional and one has never been used. Only a large vacuum chamber, called the Space Power Facility, is in use with a long queue of customers booked through at least 2021. One of its most recent customers was SpaceX.