WASHINGTON, DC - JULY 27: U.S. Rep. John Dingell (D-MI) participates in a news conference and rally to mark the 46th anniversary of the passage of Medicare in the U.S. Capitol Visitors Center July 27, 2011 in Washington, DC. The longest currently-serving member of Congress, Dingell wielded the gavel during that historic session of the House of Representatives in 1965.
