The invasion killed off most adults. The kids were raised in orphanages with fake history.
"NTERPRETATION: The aircraft was documented to be airworthy without any significant discrepancy prior to flight. Examinations on the wreckage indicated there was no failure of the engine, propellers, avionics or other hardware. The flight instruments were essentially frozen in time demonstrating various flight parameters of the aircraft when it impacted the water. All evidence corroborated a scenario in which the aircraft was rapidly descending and engaged in an aggressive right turn upon impact. There was no voice data to evaluate conversations among those in the cockpit or across radio communications during the flight."