CREATE TABLE table_46311 ("from" CLOB, "aircraft" CLOB, "carrier" CLOB, "air wing" CLOB, "tail code" CLOB, "area" CLOB)

Which carrier was deployed on 18 July 1968?
SELECT "carrier" FROM table_46311 WHERE "from" = '18 july 1968'
SELECT "carrier" FROM "table_46311" WHERE "from" = '18 july 1968'