It's highly likely both did.. just like BOTH the F-16 and C150 did in the SC mid-air. So transponders alone do not eliminate the risk, and as noted, since there has only been one incident with a glider/non-glider in the past nine years, why would we mandate something which isn't affordable to all, causes issues with battery/power over long flights if not allowed to be turned off/managed, and clearly, does not eliminate the risk???