Washington DC

Federal Reserve Board Governor Tarullo administers the oath of office to new Federal Reserve Board Chairwoman Yellen at the Federal Reserve Board in Washington...Federal Reserve Board Governor Daniel Tarullo (L) administers the oath of office to new Federal Reserve Board Chairwoman Janet Yellen at the Federal Reserve Board in Washington, February 3, 2014.  REUTERS/Jim Bourg    (UNITED STATES - Tags: BUSINESS POLITICS)

Jim Bourg/Reuters

US Federal Reserve board governor Daniel Tarullo (left) administers the oath of office to new board chairwoman Janet Yellen in the Fed’s board room, Washington 

US Vice President Joe Biden greets Environmental Protection Agency workers with muffins as they return to work after 16 days of a government shutdown at the William Jefferson Clinton Federal Building in Washington DC.

Jacquelyn Martin / AP

Joe Biden, US vice-president, greets Environmental Protection Agency workers with muffins as they return to work after 16 days of a US government shutdown at the William Jefferson Clinton Federal Building in Washington.

Michelle Obama Visits Local Washington DC School...WASHINGTON, DC - MAY 24:  U.S. first lady Michelle Obama dances with pre-kindergarten students while she visits the Savoy School May 24, 2013 in Washington, DC. The Savoy School, once one of the lowest performing schools in the District of Columbia, has shown significant signs of improvement since being designated as one of eight schools selected last year for the Turnaround Arts Initiative by the President's Committee on the Arts and the Humanities.  (Photo by Win McNamee/Getty Images)

Win McName/Getty

US First Lady Michelle Obama dances with pre-kindergarten students while she visits the Savoy School on Friday in Washington, DC. The school, once one of the lowest performing in the District of Columbia, has shown significant signs of improvement since being designated as one of eight schools selected last year for the Turnaround Arts Initiative by the President’s Committee on the Arts and the Humanities.