Jon Edward Hass, for the Sole Use and Benefit of the United States of America, and Jon Edward Hass, Individually v. United States of America

' CRAVEN, Circuit Judge:

On May 30, 1971, Marine First Lieutenant Jon Edward Hass was injured while riding a horse he had rented from a stable owned and operated by the Marine Corps at its Air Station in Cherry Point, North Carolina. He sued Raymond Russ and William Williams, the civilian manager and assistant manager of the stable, alleging negligence in their failure to warn him of the horse’s dangerous propensity to break its gait and bolt, and also sued the United States, as their employer, under the Federal Tort Claims Act, 28 U.S.C. § 2671 et seq. The district court granted summary…