In this May 17, 2015, file photo, Vice President Joe Biden gestures after donning a pair of sunglasses as he delivers the Class Day Address at Yale University in New Haven, Conn. (AP Photo/Jessica Hill, File)
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In this May 17, 2015, file photo, Vice President Joe Biden gestures after donning a pair of sunglasses as he delivers the Class Day Address at Yale University in New Haven, Conn. (AP Photo/Jessica Hill, File)
