The released record says james J. McCampbell's chapter 'FLIGHT AND PROPULSION' strengthens the conviction that Einstein was on scent like a bloodhound when he persisted in trying to lock in on a unified field theory. File: DOE-UAP-D002, James Tuck Correspondence, 1970s. DOE-UAP-D002, James Tuck Correspondence, 1970s combines an official, downloadable document, 4 extracted claims, 3 evidence records, and 2 timeline entries across 4 source pages, and file-level provenance that can be compared with related release records.