CREATE TABLE table_65998 ("Country" TEXT, "Airport" TEXT, "City" TEXT, "2010" FLOAT, "Change  ( 10/09 ) " TEXT)

Which country is the nnamdi azikiwe international airport in?
SELECT "Country" FROM table_65998 WHERE "Airport" = 'nnamdi azikiwe international airport'
SELECT "Country" FROM "table_65998" WHERE "Airport" = 'nnamdi azikiwe international airport'