What is the title when original air date is may15,2008?
CREATE TABLE "table1_10701133_1" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "featured_character_s" text,
  "original_air_date" text,
  "u_s_viewers_million" text
);
SELECT "title" FROM "table1_10701133_1" WHERE "original_air_date"='May15,2008';