TLS, one page, 7.25 x 10.5, Eastern Air Lines, New York letterhead, September 1, 1948. In part: “In an effort to extend public appreciation and understanding of America’s Air Power and how it contributes to maintaining peace, a motion picture titled Air Power is Peace Power has recently been made…deals with the development of aviation from the Wright Brothers to jets and rockets. This full-color film will have a premiere at an informal reception to be held in Washington on September 13, to which a small and distinguished group is being invited. It is my sincere hope that you will be able to accept this invitation….” In fine condition, with scattered light creasing, staple and file holes to upper border. R&R COA.