US Vice President Joe Biden (right) points to some faces in the crowd with his son Hunter as they walk down Pennsylvania Avenue following the inauguration ceremony of President Barack Obama in Washington, January 20, 2009. Photo: Carlos Barria/Reuters.

US Vice President Joe Biden (right) points to some faces in the crowd with his son Hunter as they walk down Pennsylvania Avenue following the inauguration ceremony of President Barack Obama in Washington, January 20, 2009. Photo: Carlos Barria/Reuters.