A 25-year-old Southern California man has been identified as the attacker who detonated a car bomb outside a fertility clinic in Palm Springs Saturday — killing himself and injuring four other people, according to sources. Guy Edward Bartkus, of Twentynine Palms, is believed to have detonated an explosive device in his car outside the American Reproductive Centers, which performs IVF treatments, egg collections and other procedures, law enforcement sources told The Post. On Saturday, FBI agents swarmed his home and evacuated the neighborhood, declaring it a “blast zone” over concerns that he could have left explosives behind, ABC7 reported. During...