Which UK Base has an airborne unit of Pathfinders?
CREATE TABLE "air_movement_table_mission_boston" (
  "serial" real,
  "airborne_unit" text,
  "troop_carrier_group" text,
  "num_of_c_47s" real,
  "uk_base" text,
  "drop_zone" text,
  "drop_zone_time" real
);
SELECT "uk_base" FROM "air_movement_table_mission_boston" WHERE "airborne_unit"='pathfinders';