Some countries play it close to the vest when it comes to controlling the investigations into airplane accidents. This is especially so when initial evidence calls into question the competence of a state airline or the government’s air traffic control system or pilots from their nations. More typical, however, is that nations welcome participation by expert investigators from other countries. That’s the way it was with Costa Rica when, on December 31, 2017, Nature Air Flight 9916 crashed shortly after departing Punta Islita Airport near Corozalito, Costa Rica.
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