DETROIT -- A day after Health and Human Services secretary Robert F. Kennedy Jr. made anti-Arab remarks at a get-out-the-vote rally for Republican candidates in Grand Rapids, he declined to address the comments during a stop in Detroit to promote a new care program for homeless individuals. Kennedy said Monday evening that Arabs do not contribute to research in science and literature, blaming the Muslim Brotherhood for "destroying" the Muslim tradition that "produced all of these great foundational discoveries in science and medicine and biology and navigation" -- remarks that have been largely condemned as racist and Islamophobic. "There are five hundred million Arabs in the world. And yet they don't produce science," Kennedy said. "They don't win the Nobel Prize. They don't win the Fields Medal. They don't win the Wolf Prize."