![File:Former U.S. Secretary of Defense Donald Rumsfeld, right, shakes hands with a guest at a book signing for his autobiography, "Known and Unknown- A Memoir," at the Commander Fleet Activities Yokosuka 111008-N-IO627-022.jpg - File:Former U.S. Secretary of Defense Donald Rumsfeld, right, shakes hands with a guest at a book signing for his autobiography, "Known and Unknown- A Memoir," at the Commander Fleet Activities Yokosuka 111008-N-IO627-022.jpg -](https://upload.wikimedia.org/wikipedia/commons/thumb/7/76/Former_U.S._Secretary_of_Defense_Donald_Rumsfeld%2C_right%2C_shakes_hands_with_a_guest_at_a_book_signing_for_his_autobiography%2C_%22Known_and_Unknown-_A_Memoir%2C%22_at_the_Commander_Fleet_Activities_Yokosuka_111008-N-IO627-022.jpg/1024px-thumbnail.jpg)
File:Former U.S. Secretary of Defense Donald Rumsfeld, right, shakes hands with a guest at a book signing for his autobiography, "Known and Unknown- A Memoir," at the Commander Fleet Activities Yokosuka 111008-N-IO627-022.jpg -
![Former US defense secretary Donald Rumsfeld signs autographs after taking part in a discussion on his recently released book 'Known and Unknown: A Memoir' on February 22, 2011 at the Heritage Foundation Former US defense secretary Donald Rumsfeld signs autographs after taking part in a discussion on his recently released book 'Known and Unknown: A Memoir' on February 22, 2011 at the Heritage Foundation](https://c8.alamy.com/comp/2E1EM3M/former-us-defense-secretary-donald-rumsfeld-signs-autographs-after-taking-part-in-a-discussion-on-his-recently-released-book-known-and-unknown-a-memoir-on-february-22-2011-at-the-heritage-foundation-in-washington-dc-usaphoto-by-olivier-doulieryabacapresscom-2E1EM3M.jpg)
Former US defense secretary Donald Rumsfeld signs autographs after taking part in a discussion on his recently released book 'Known and Unknown: A Memoir' on February 22, 2011 at the Heritage Foundation
![Known and Unknown; A Memoir by Donald Rumsfeld - 1st Edition - 2011 - from Walnut Valley Books/Books by White (SKU: 011621) Known and Unknown; A Memoir by Donald Rumsfeld - 1st Edition - 2011 - from Walnut Valley Books/Books by White (SKU: 011621)](https://d3525k1ryd2155.cloudfront.net/h/130/936/1408936130.0.x.jpg)
Known and Unknown; A Memoir by Donald Rumsfeld - 1st Edition - 2011 - from Walnut Valley Books/Books by White (SKU: 011621)
![File photo dated February 22, 2011 of former US Defense Secretary Donald Rumsfeld takes part in a discussion on his recently released book 'Known and Unknown: A Memoir' at the Heritage Foundation File photo dated February 22, 2011 of former US Defense Secretary Donald Rumsfeld takes part in a discussion on his recently released book 'Known and Unknown: A Memoir' at the Heritage Foundation](https://c8.alamy.com/comp/2G5YNKH/file-photo-dated-february-22-2011-of-former-us-defense-secretary-donald-rumsfeld-takes-part-in-a-discussion-on-his-recently-released-book-known-and-unknown-a-memoir-at-the-heritage-foundation-in-washington-dc-usa-donald-rumsfeld-the-acerbic-architect-of-the-iraq-war-and-a-master-washington-power-player-who-served-as-us-secretary-of-defense-for-two-presidents-has-died-at-the-age-of-88-photo-by-olivier-doulieryabacapresscom-2G5YNKH.jpg)
File photo dated February 22, 2011 of former US Defense Secretary Donald Rumsfeld takes part in a discussion on his recently released book 'Known and Unknown: A Memoir' at the Heritage Foundation
![Donald Rumsfeld to talk about his memoir, 'Known and Unknown', at Gerald R. Ford Museum Monday - mlive.com Donald Rumsfeld to talk about his memoir, 'Known and Unknown', at Gerald R. Ford Museum Monday - mlive.com](https://www.mlive.com/resizer/HA2O3OHNaOcTJZYm0BTfGAU6rZs=/1280x0/smart/advancelocal-adapter-image-uploads.s3.amazonaws.com/image.mlive.com/home/mlive-media/width2048/img/elections_impact/photo/rumsfeld-c1e7795e17ee97c3.jpg)
Donald Rumsfeld to talk about his memoir, 'Known and Unknown', at Gerald R. Ford Museum Monday - mlive.com
![Former Defense Secretary Donald Rumsfeld holds his book "Known and Unknown: A Memoir" for photographers at the Heritage Foundation in Washington on February 22, 2011. UPI/Roger L. Wollenberg Stock Photo - Alamy Former Defense Secretary Donald Rumsfeld holds his book "Known and Unknown: A Memoir" for photographers at the Heritage Foundation in Washington on February 22, 2011. UPI/Roger L. Wollenberg Stock Photo - Alamy](https://c8.alamy.com/comp/W0G7M8/former-defense-secretary-donald-rumsfeld-holds-his-book-known-and-unknown-a-memoir-for-photographers-at-the-heritage-foundation-in-washington-on-february-22-2011-upiroger-l-wollenberg-W0G7M8.jpg)
Former Defense Secretary Donald Rumsfeld holds his book "Known and Unknown: A Memoir" for photographers at the Heritage Foundation in Washington on February 22, 2011. UPI/Roger L. Wollenberg Stock Photo - Alamy
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