Perry is also on the Advisory Board of the Truman National Security Project, a progressive leadership institute that trains the next generation of foreign policy and national security leaders. In March, 2006, he was appointed to the Iraq Study Group, a group formed to give advice on the U.S. government's Iraq policy. In 2007, Secretary Perry joined three other eminent statesmen, former Secretaries of State George P. Shultz and Henry Kissinger, and former Senator Sam Nunn in calling for the United States to take the lead in reducing and eliminating nuclear weapons. Their op-ed, "A World Free of Nuclear Weapons", published in the Wall Street Journal, reverberated throughout the world, and is one of the key factors that has convinced political leaders and experts internationally that the conditions are in place to achieve that goal. The four men published four subsequent op-eds in the Wall Street Journal, most recently March 5, 2013: "Next Steps in Reducing Nuclear Risks: The Pace of Non-Proliferation Work Today Doesn't Match the Urgency of the Threat". They subsequently created the Nuclear Security Project to galvanize global action to reduce urgent nuclear dangers and build support for their vision and the steps to achieve them. The Nuclear Threat Initiative (NTI), a non-partisan, non-profit organization co-chaired by Sam Nunn, serves as coordinator of the NSP, in conjunction with Stanford University's Hoover Institution. In 2010 the four produced the documentary Nuclear Tipping Point. The film is introduced by General Colin Powell, narrated by Michael Douglas and includes interviews with California Governor Arnold Schwarzenegger and former Soviet President Mikhail Gorbachev. In 2011, Perry joined a team of former government officials from various countries, formed under the auspices of the Governor of Hiroshima Prefecture Hidehiko Yuzaki to prepare a plan for the total abolition of nuclear weapons. This project is titled "Hiroshima for Global Peace". In 2013, Perry founded the William J. Perry Project to seek to promote greater public awareness about nuclear weapons and engage more people in acting to mitigate the growing threat they pose to humanity. The Project is a nonprofit venture supported with funds raised from private individuals and is sponsored by the Nuclear Threat Initiative in Washington, DC. In 2015, Perry published a memoir, "My Journey at the Nuclear Brink," (Stanford Univ. Press), with a foreword by George P. Shultz. The memoir describes coming of age at the dawn of the nuclear age, and his later roles in managing the nuclear threat. He warned that: "Today, the danger of some sort of a nuclear catastrophe is greater than it was during the Cold War and most people are blissfully unaware of this danger.”