The U.S. Constitution has withstood the test of time for more than two centuries as our nation’s charter of government and the guarantor of our liberties. Signed in Philadelphia on September 17, 1787, this founding document reflects our core values and enshrines the truths set forth in the Declaration of Independence, that we are all endowed with certain unalienable rights. (U.S Air Force graphic by Staff Sgt Joseph McKee)