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Where's the civility in America? How rude behavior is contagious

Recent events where Americans heckle public figures and public figures insult each other have prompted a lively debate about the place of civility in America. Researchers at the University of Maryland found that uncivil behavior might be contagious and rudeness can breed more rudeness. Helen Fisher, a biological anthropologist and senior research fellow at the Kinsey Institute, joins "CBS This Morning" with more on civility.
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