Jill Biden

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FILE - In this May 10, 2012, file photo, first lady Michelle Obama, accompanied by Jill Biden speaks at a Joining Forces event in honor of military mothers in the East Room of the White House in Washington. Michelle Obama and Jill Biden are getting some high-profile support for their initiative to help military families. They are being joined at the White House on Friday by former first lady Rosalynn Carter and former Sen. Elizabeth Dole for an announcement about support for the caregivers of wounded service members and veterans. (AP Photo/Carolyn Kaster, File)

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Jill Biden, wife of Vice President Joe Biden, shows off her camouflage cast on her arm as she speaks at the George W. Bush Institute at Southern Methodist University Wednesday, Feb. 19, 2014, in Dallas. Former President George W. Bush's policy institute is hosting the summit on helping veterans transition to civilian life. (AP Photo/LM Otero)

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Jill Biden, wife of Vice President Joe Biden applauds during President Barack Obama's State of the Union address on Capitol Hill in Washington, Tuesday Jan. 28, 2014. Mrs. Biden's arm is in a cast after she broke her wrist after a fall. (AP Photo/J. Scott Applewhite)

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President Obama (from left), first lady Michelle Obama, Vice President Joseph R. Biden and Jill Biden join members of the White House staff during a moment of silence on Wednesday, Sept. 11, 2013, on the South Lawn of the White House in Washington to mark the 12th anniversary of the 9/11 attacks. (AP Photo/Pablo Martinez Monsivais)

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Jill Biden, wife of Vice President Joseph R. Biden, arrives at the West Front of the Capitol in Washington on Monday, Jan. 21, 2013, for the 57th Presidential Inauguration. (AP Photo/Win McNamee, Pool)

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Vice President Joe Biden hugs his wife, Jill Biden after being sworn in for his second term on the West Lawn of the U.S. Capitol Building at the 57th Presidential Inauguration Ceremony, Washington, D.C., Monday, January 21, 2013. (Andrew Harnik/The Washington Times)