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WILMINGTON, DE - JUNE 6: U.S. Vice President Joe Biden (C) and his wife Dr. Jill Biden (R) arrive with family for a mass of Christian burial at St. Anthony of Padua Church for there son, former Delaware Attorney General Beau Biden, on June 6, 2015 in Wilmington, Delaware. U.S. President Barack Obama is expected to deliver a eulogy for the son of Vice President Joe Biden after he died at 46 following a two-year battle with brain cancer. (Photo by Mark Makela/Getty Images)

WILMINGTON, DE - JUNE 6:  U.S. Vice President Joe Biden (C)  and his wife Dr. Jill Biden (R) arrive with family for a mass of Christian burial at St. Anthony of Padua Church for there son, former Delaware Attorney General Beau Biden, on June 6, 2015 in Wilmington, Delaware. U.S. President Barack Obama is expected to deliver a eulogy for the son of Vice President Joe Biden after he died at 46 following a two-year battle with brain cancer.  (Photo by Mark Makela/Getty Images)