J. Scott Applewhite/AP
  • Gold Star family, 2016

    Gold Star family, 2016
    Khizr Khan, father of fallen Army Capt. Humayun S. M. Khan, holds up a copy of the U.S. as his wife listens during the final day of the Democratic National Convention in Philadelphia, July 28, 2016. Waving a copy of the U.S. Constitution in a searing speech, Khan spoke directly to Republican presidential candidate Donald Trump,“Let me ask you: Have you even read the United States Constitution? I will gladly lend you my copy.” Khan said, "You have sacrificed nothing and no one."
    J. Scott Applewhite/AP
  • Eastwood and the chair, 2012

    Eastwood and the chair, 2012
    Actor Clint Eastwood, billed as a mystery guest on the schedule, talks to an empty chair as he addresses an "invisible" President Barack Obama during the 2012 Republican National Convention at the Tampa Bay Times Forum on Aug. 30, 2012, in Tampa, Fla. Eastwood's ad-libbed monologue spawned the Twitter handle "Invisible Obama," which gained 20,000 followers in the first hour and many comedic takes.
    The Washington Post via Getty Images
  • Sarah Palin, hockey mom, 2008

    Sarah Palin, hockey mom, 2008
    A little-known governor from Alaska, Sarah Palin rose to the national spotlight after being selected by John McCain to be his running mate. When she accepted the Republican Party’s nomination at the 2008 Republican Convention on Sept. 3, 2008, in St. Paul, Minn., she highlighted her life story, calling herself a “hockey mom.” She then delivered a joke, “You know, they say the difference between a hockey mom and a pit bull? Lipstick," bringing the crowd to its feet and becoming an instant celebrity.
    NBCUniversal via Getty Images
  • Barack Obama’s breakthrough address, 2004

    Barack Obama’s breakthrough address, 2004
    Keynote speaker Barack Obama, a Senate candidate from Illinois, addresses the Democratic National Convention, July 27, 2004, in Boston. His appearance was his introduction to a national audience and his speech would help propel him to accept the party's nomination just four years later. A gifted orator, he declared, "Now even as we speak, there are those who are preparing to divide us, the spin masters and negative ad peddlers who embrace the politics of anything goes. Well, I say to them tonight, there's not a liberal America and a conservative America; there's the United States of America.”
    Timothy A Clary/AFP/Getty Images
  • The Kiss, 2000

    The Kiss, 2000
    Vice President Al Gore kisses his wife Tipper before accepting the Democratic nomination for president of the United States on the fourth and final night of the Democratic National Convention in Los Angeles, Aug. 17, 2000. The full-mouthed extended kiss created buzz with many theorizing it was aimed at loosening up the candidate's image and showing the strength of the couple's marriage following the Bill Clinton-Monica Lewinsky scandal.
    Robert Nickelsberg/Getty Images
  • George Bush promises 'no new taxes,' 1988

    George Bush promises 'no new taxes,' 1988
    Vice President George Bush accepted his nomination as the Republican presidential candidate at the Republican National Convention in New Orleans, Aug. 18, 1988. It was during this speech that Bush stated, "Read my lips, no new taxes," one of the most famous broken promises in political history.
    AP
  • Mario Cuomo's 'Tale of Two Cities,' 1984

    Mario Cuomo's 'Tale of Two Cities,' 1984
    New York Gov. Mario Cuomo delivers his keynote address to the Democratic National Convention on July 16, 1984, in San Francisco. Cuomo was praised for his "Tale of Two Cities" speech that galvanized the convention, but despite a torrent of praise for his intellect, passion and insightful words, he would not run for higher office.
    AP
  • First woman vice presidential nominee, 1984

    First woman vice presidential nominee, 1984
    Geraldine Ferraro made her acceptance speech for the vice presidential nomination during the 1984 Democratic National Convention, July 19, 1984, becoming the first female vice presidential nominee for a major party in American history. Her nomination would pave the way for Sarah Palin's vice presidential candidacy in 2008 and Hillary Clinton's bid for president in 2016 as the first female nominee for a major party.
    Bettmann Archive/Getty Images
  • 1968 Chicago protests

    1968 Chicago protests
    A large protest against the Vietnam War in a park outside the 1968 Democratic National Convention in Chicago was answered with force after Mayor Richard Daley broke up the peaceful demonstration with thousands of riot police turning it into a violent confrontation.
    Michael Ochs Archives/Getty Images