CREATE TABLE table_59939 ("Spaceport" TEXT, "Launch complex" TEXT, "Launcher" TEXT, "Spacecraft" TEXT, "Flights" TEXT, "Years" TEXT)

Which spacecraft were launched by the Titan II?
SELECT "Spacecraft" FROM table_59939 WHERE "Launcher" = 'titan ii'
SELECT "Spacecraft" FROM "table_59939" WHERE "Launcher" = 'titan ii'