Last summer they graduated large numbers of freefall students , far more than for any season over the previous decade .
Last summer , a local DZ insisted that all prospective freefall students train for a few minutes in the wind tunnel .
Last summer students graduated large numbers of freefall students , far more than for any season over the previous decade .
Last summer , a local DZ insisted that all prospective freefall students train for a few minutes in the wind tunnel .