 A cruciform fin arrangement provided stabilization; the fins were mounted on a sliding assembly, allowing them to shift to the opposite end of the rocket's body when the retrorocket was fired to reverse the rocket's direction for the return flight.Flight testing of Ping-Pong took place at Rosamond Dry Lake in California during the second half of 1964.The tests were considered to be successful, with the rocket being reported as "the free world's only round-trip ballistic missile"; however, follow-up studies did not result in further development.