Biden

U.S. President Obama hugs Vice President Biden after Biden announced he will not seek the 2016 Democratic presidential nomination during an appearance at the White House in Washington

Carlos Barria/Reuters

U.S. President Barack Obama hugs Vice President Joe Biden after Biden announced he will not seek the 2016 Democratic presidential nomination during an appearance in the Rose Garden of the White House in 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.