Franklin Mint – History of the US – Pentagon Papers Bare Vietnam War Secrets – 1971 – 45mm – Proof Bronze Medal – May 1 – Amtrack train service begins – May 2-5 – Antiwar protest in Washington – June 13 – New York Times begins publication of secret Pentagon Papers – June 30 – Voting age lowered to 18 by constitutional amendment – Aug 15 – Wages and prices “frozen” in effort to control inflation.