We're Martin's people.' Marchers head down Market Street Friday in observance of the 53rd anniversary of the birth of the Rev. Dr. Martin Luther King Jr. They hold portraits of Dr. King and signs calling for Dr. King's birthday to be made a national holiday. Some of the marchers knew Dr. King and marched with him during the 1960s. Dr. King was assassinated in Memphis in 1968. Story on 2A.