Vice President Joe Biden speaks at a ceremony on Capitol Hill in Washington, Thursday, Jan. 20, 2011, marking the 50th anniversary of President John F. Kennedy's inaugural speech. (AP Photo/Charles Dharapak)
July 4, 2011 11:50:36 AM PDT
By ERICA WERNER Associated Press
WASHINGTON - July 4, 2011 --
Now appearing on Twitter: Vice President Joe Biden.