What tail number was on the an-26, with 25/25 fatalities?
CREATE TABLE "accidents_and_incidents" (
  "location" text,
  "aircraft" text,
  "tail_number" text,
  "aircraft_damage" text,
  "fatalities" text
);
SELECT "tail_number" FROM "accidents_and_incidents" WHERE "aircraft"='an-26' AND "fatalities"='25/25';