Gripping picture, with all the freshness and zest of the thrilling sport it glorifies, aviation. It is based on one of the few original screen stories now current: briefly, air banditry by medium of the death-dealing Kappa way. Kenneth Harlan is the daring aviator who solves the mystery of the abandoned desert town where planes disappear, and William V. Mong is splendid as the sinister criminal scientist. No adventure fan should miss it.