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UNIVERSITY CITY, MO - FEBRUARY 22: Signs are shown on display outside the Chesed Shel Emeth Cemetery on February 22, 2017 in University City, Missouri. Missouri Gov. Eric Greitens and U.S. Vice President Mike Pence were on hand to speak to more than 300 volunteers cleaning up after recent vandalism at the cemetery. Since the beginning of the year, there has been a nationwide spike in incidents including bomb threats at Jewish community centers and reports of anti-semitic graffiti. (Photo Michael Thomas/Getty Images)

UNIVERSITY CITY, MO - FEBRUARY 22: Signs are shown on display outside the Chesed Shel Emeth Cemetery on February 22, 2017 in University City, Missouri. Missouri Gov. Eric Greitens and U.S. Vice President Mike Pence were on hand to speak to more than 300 volunteers cleaning up after recent vandalism at the cemetery. Since the beginning of the year, there has been a nationwide spike in incidents including bomb threats at Jewish community centers and reports of anti-semitic graffiti. (Photo Michael Thomas/Getty Images)